Saitama Prefecture Research Articles

Possibility of diffusion and challenges of a frailty prevention class hosted by older adults: Efforts by the Saitama Prefecture Silver Human Resources Center Federation Headquarters

Objectives Since 2018, the Saitama Prefecture Silver Human Resources Center (SHRC) Federation Headquarters and Tokyo Metropolitan Institute for Geriatrics and Gerontology has attempted to diffuse a business model in which SHRC members are compensated for operating a frailty prevention class. This activity report clarifies these efforts, examines the feasibility of diffusing this model based on each SHRC's project implementation status, and summarizes the relevant issues.Methods To promote the commercialization of classes, all 58 SHRCs in Saitama Prefecture were offered (1) class programs comprising a multifactorial program (exercise, nutrition, and social interactions) and teaching materials, (2) training courses for frailty prevention supporters who manage the classes (three days × four blocks/year), (3) project information exchange meetings (held once annually), and (4) consultation support for project implementation. A questionnaire survey on the project implementation status was conducted among SHRC employees to evaluate the possibility of project diffusion based on adoption, implementation, and continuation. Furthermore, project implementation issues were categorized using free descriptions as codes to create subcategories based on content and categories based on subcategory similarities.Results Regarding adoption, among the 58 SHRCs, 43 (74.1%) participated in training courses for frailty prevention supporters and 34 (58.6%) implemented the project from 2018 onwards. Regarding implementation, 23 (39.7%) SHRCs provided rewards to frailty prevention supporters (67.6% of the SHRC that implemented the project). Regarding continuation, 21 of the 28 SHRCs (75.0%) that began the project by 2021 continued it for two years or longer. Moreover, implementation challenges related to project initiation, supporters, new entrants, and class management were categorized.Conclusions More than half of the SHRCs implemented the project, 40% of SHRC provided rewards for frailty prevention supporters, and 75% of SHRCs that implemented the project continued working on it. Hence, the model may be extended to other regions. However, four issues have been identified. The model is likely to have a ripple effect, increasing the number of individuals involved in community frailty prevention and creating attractive employment opportunities for the elderly. We intend to address these challenges and disseminate our model further.

Public school teachers' perceptions of internet gaming problems among students: current status and challenges

Objectives This study aimed to identify and understand the challenges faced by public school teachers regarding issues related to Internet gaming.Methods An electronic questionnaire was administered to 400 public school teachers in the Saitama Prefecture from September to November 2021. A total of 352 valid responses were obtained. The survey content included teachers' knowledge of gaming disorders, whether their students experienced gaming-related problems, difficulties perceived by teachers, how they discovered the problems, how they dealt with them, the challenges they faced in dealing with the problems, and desired support. Data were analyzed based on the teachers' roles, responsibilities, type of school, and knowledge of gaming difficulties. Fisher's exact probability tests were used to determine significance, and adjusted standardized residuals were used to assess the differences between groups.Results Nearly 63.1% of the teachers already had knowledge of gaming disorders, and 49.4% acknowledged the existence of students with gaming problems. The most common reasons for discovering problems were disrupted daily rhythm (51.7%) and increased tardiness and early dismissal (34.7%). The main actions taken to address gaming problems were "consultation and information sharing with families" (48.6%) and "individual guidance by teachers" (34.1%). Approximately half of the teachers indicated that they regularly experienced difficulties in activities related to prevention, early detection, student support, and interaction with parents. Specific challenges included limited guidance and involvement with families (61.4%) and the inability to intervene and provide effective support (62.5%). Teachers' support included programs for addiction recovery (56.8%), awareness programs for parents (56.0%), and staff training to increase the understanding of gaming disorders (50.5%). The responses varied according to teacher role and school type, indicating that implementation rates and difficulties were higher in middle schools.Conclusion We found that teachers tended to view internet gaming problems as family problems and provide complementary support for home education. Teachers also found it difficult to deal with students with gaming problems. Depending on the teacher's role in the school and the type of school, requests for support varied. Elementary and special-needs schools needed teaching materials that could be used for classroom and school-wide instruction and guidance for concerned students and their parents; junior high schools needed a consultation system with school counselors and other professionals and cooperation with healthcare; and high schools needed measures and support, including social support.

Approaches to Dementia Control in a Community in Japan

Abstract Background In order to consider future dementia countermeasures in the community, we conducted a survey to understand the characteristics of the elderly living in the community. Methods A self-administered questionnaire survey was conducted in collaboration with Hanno-city, Saitama Prefecture, targeting all persons aged 65 years or older (excluding institutionalized residents) living in Hanno-city (aging rate: 32.0%). The questionnaire items included basic attributes, lifestyle, daily living conditions, and willingness to participate in activities. The survey was sent to 7,133 people, and 3,623 valid responses were received (valid response rate: 50.8%). Results Respondents were 1,135 males (51.2%) and 1,080 females (48.8%); 1,979 (54.6%) were aged 65-74 and 1,644 (45.4%) were aged 75 and over. The proportion of single-person households was 12.1%. 56.1% of the respondents had been living in the community for 30 years or more, and the overall membership rate of the residents’ association was high at 91.0%. A total of 691 (19.1%) of the respondents had seen someone suspected of having dementia. 1,178 (32.5%) answered ‘yes,’ 1,452 (40.1%) answered ‘no,’ and 881 (24.3%) answered ‘don’t know. There were 472 (8.1%) dementia supporters. Conclusions The membership rate of local residents’ associations was high at 91.0%, indicating that the community maintains relatively close relationships with its residents. Based on the National Dementia plan, further consideration will be given to long-term goals such as human resource development for each region and policies to support these goals. Main messages: In a mountainous district with an aging population similar to that of Japan as a whole, only about one-third of the respondents knew of a contact point for dementia-related issues. Based on the National Dementia Plan, the government will consider dementia policies, including long-term goals and policies to support these goals in the community. Key messages • In a mountainous district with an aging population similar to that of Japan as a whole, only about one-third of the respondents knew of a contact point for dementia-related issues. • Based on the National Dementia Plan, the government will consider dementia policies, including long-term goals and policies to support these goals in the community.

Effects of neighbourhood characteristics on the distribution of vacant houses in Toda city, a satellite city of Tokyo metropolis of japan

As Japan faces a growing crisis of vacant housing, this study investigates the underexplored relationship between vacant house distribution and neighbourhood characteristics in Toda City, a satellite city of the Tokyo metropolis located in Saitama Prefecture. We selected 10 community features, including living convenience, housing supply, and policy support, to explore their influence on vacancy rates. Using a comprehensive dataset primarily derived from the PLATEAU data, we employed a two-step method combining global and local Moran’s I analyses to assess the spatial distribution normality of vacant houses. We then compared traditional statistical data analysis with spatial data analysis through multiscale geographically weighted regression to evaluate their effectiveness and identify the factors most closely associated with vacancy rates. Our findings reveal that spatial data analysis provides superior insights compared to traditional statistical methods. Both approaches consistently indicate a significant positive correlation between the supermarket area ratio and vacancy rates, and a significant negative correlation between road adjacency and vacancy rates. This study demonstrates the feasibility of using spatial data to analyse neighbourhood characteristics in the context of declining vacancy rates in satellite cities. The insights gained offer theoretical support for selecting data and methodologies in future research and policymaking that are aimed at mitigating the growth of vacant houses.

Salt reduction attempts in workers after specific food service facility guidance provided by a public health center: A case study at a worksite in Kawagoe City, Saitama Prefecture

Objective The Kawagoe City Public Health Center implemented a project to reduce salt intake through specific food service facility guidance in workplace cafeterias. Here, we report the study results.Methods The target worksite was company A, with approximately 270 employees, located in Kawagoe City, Saitama Prefecture. There were 214 participants (approximately 80%). The project was conducted from November 2019 to November 2021. The long-term goal was to decrease the number of hypertensive cases in the city. Project outcomes included decreased salt intake, urinary sodium/potassium ratio, and average blood pressure. The project aimed to improve the cafeteria menu, focusing on salt reduction by offering Smart Meals® and reducing the salt equivalents in all menus. The project output indicators included reduced amount of salt in cafeteria menu items, increased frequency of cafeteria use, increased positive evaluations of the cafeteria, and increased daily awareness of the need for salt reduction. Spot urine samples, blood pressure measurements, and self-administered questionnaire data were collected during annual physical examinations. The amount of salt in the cafeteria menu was evaluated by receiving monthly data from the food service company to which company A outsourced its cafeteria operations.Results The analysis included 102 individuals with complete data from to 2019-2021. Estimated salt intake (g/day) from spot urine decreased from 10.3±2.1 in 2019 to 9.8±2.4 in 2020 and 9.5±2.0 in 2021 (P=0.003). Systolic blood pressure (mmHg) decreased from 114.7±12.5 in 2019 to 111.7±12.1 in 2020 and 110.6±12.0 in 2021 (P=0.010). Compared to 2019, changes in dietary salt equivalents in cafeteria menus in 2020 and 2021decreased for set meals A and B, curries, and noodles (P<0.001).Conclusion We offered Smart Meals® and reduced salt equivalents in all workplace cafeteria menus. After 1-2 years, employees' salt intake and blood pressure levels were lower. These results provide implications for the implementation of food environment improvements in public health centers and other local government agencies to promote the Health Japan 21 (third term) strategy.

SARS-CoV-2 detection in pediatric dental clinic wastewater reflects the number of local COVID-19 cases in children under 10 years old

This was the first longitudinal study to analyze dental clinic wastewater to estimate asymptomatic SARS-CoV-2 infection trends in children. We monitored wastewater over a 14-month period, spanning three major COVID-19 waves driven by the Alpha, Delta, and Omicron variants. Each Saturday, wastewater was sampled at the Pediatric Dental Clinic of the only dental hospital in Japan’s Saitama Prefecture. The relationship between the weekly number of cases in Saitama Prefecture among residents aged < 10 years (exposure) and wastewater SARS-CoV-2 RNA detection (outcome) was examined. The number of cases was significantly associated with wastewater SARS-CoV-2 RNA positivity (risk ratio, 5.36; 95% confidence interval, 1.72–16.67; Fisher’s exact test, p = 0.0005). A sample from Week 8 of 2022 harbored the Omicron variant. Compared to sporadic individual testing, this approach allows continuous population-level surveillance, which is less affected by healthcare seeking and test availability. Since wastewater from pediatric dental clinics originates from the oral cavities of asymptomatic children, such testing can provide important information regarding asymptomatic COVID-19 in children, complementing clinical pediatric data.

Gender Gaps in Strategies for Maintaining the Social Participation and Interaction of Older Adults with People in a Local Community

Purpose. This study aims to elucidate the gender gaps in the strategies for maintaining the social participation and interaction of older adults with people in a local community. Methods. The subjects were 130 older adults aged 65 years or older and independently living in their homes in Saitama, Saitama Prefecture, Japan. The authors conducted an anonymous questionnaire survey on paper and performed multiple regression analysis for men and women separately using the Lubben Social Network Scale-6 (LSNS-6) as the dependent variable. Results. Among the independent variables used for the analysis, those that significantly influenced LSNS-6 in men were social activities related to the daily life satisfaction of the elderly (SARDS). The independent variables that significantly influenced LSNS-6 in women were SARDS, sense of coherence-13 (SOC-13), and the number of family members living with the subjects. Discussion. Health promotion is not associated with interaction with people in men compared with women.

Notice of formal repository of the remaining teeth of an associated fossil specimen of the megatooth shark, Otodus megalodon (Lamniformes: Otodontidae), to the Saitama Museum of Natural History, Japan

ABSTRACT In 1989, the occurrence of 73 associated teeth of the megatooth shark, Otodus megalodon (Lamniformes: Otodontidae) was reported from the late Miocene Tsuchishio Formation in northern Saitama Prefecture, Japan. However, part of the tooth set remained uncatalogued. This short note is to document the permanent repository of the remaining teeth officially to the Saitama Museum of Natural History.

Perception and Relocation Intentions of Japanese Youth towards Rural Areas: A Case Study of Visitors in Hanyu-shi, Saitama Prefecture

As a highly urbanized country, Japan is facing the phenomenon of a continuous migration of young people from rural areas to cities, leading to an aging and decreasing population in rural communities. Influenced by the pandemic, people began to reconsider the issue of population concentration in large cities, causing urban residents to become interested in returning to rural areas. The focus of this study is on the perceptions and relocation intentions of Japanese youth towards rural areas, particularly in Hanyu-shi, Saitama Prefecture. Through semi-structured interviews with 26 urban university students who live in urban areas, this study explores the factors that attract or hinder them from having rural lives. The survey results show that childhood experiences and current lifestyle preferences have influenced their views on rural areas. The main hindering factors include backwards infrastructure, communication difficulties, and limited job prospects. This study reveals a significant cognitive gap in urban youth’s attitudes towards rural life in Japan. The study emphasizes the need to eliminate these hindrances and enhance the attractiveness of rural areas to promote reverse urban migration. This study provides important insights for policymakers and urban planners, highlighting the necessity of formulating development strategies that meet the needs of urban youth residents, which is crucial for the sustainable revitalization of rural Japan.

PUBLIC BATH USE AT A JAPANESE SENIOR APARTMENT ASSOCIATED WITH NEIGHBORHOOD RELATIONSHIPS AND SOCIAL SUPPORT

Abstract The number of older adults who choose to move into senior apartments is increasing in Japan. The development of quality relationships within the senior apartment is important for the healthy aging of the residents. A “public bath” is a unique facility in Japanese senior apartment where residents can interact with each other. Historically, Japan has had a culture of bathing with family and friends in public baths, and the use of this facility is expected to lead to socialization. This study aimed to examine the association between the frequency of public bath use, and neighborhood relationship and social support within a senior apartment. A cross-sectional survey was conducted in a senior apartment in February 2022 (Saitama Prefecture, Japan) towards the entire residents (n=185). Frequency of public bath use (once a week or more vs. less than once a week) was used as the independent variable. Neighborhood relationship (can support or talk to each other vs. only light greetings or no relationship) and social support (have vs. do not have social support) within the senior apartment were used as dependent variable. A binary regression analysis (n=117, female=60.7%) revealed that a higher frequency of public bath use associated with deep neighborhood relationship (OR: 7.14, 95% CI: 1.39-36.63) and social support (OR: 3.44, 95% CI: 1.19-9.99). These results suggest the importance of having a public bath in Japanese senior apartment setting. Furthermore, integrating facilities that possess cultural significance at senior apartments could be important for fostering social relationships.

Simulating Strong Ground Motion from the Great 1923 Kanto Earthquake in the Tokyo Metropolitan Area Based on Source Model Derived from Seismic Intensity Data

ABSTRACT This study simulates strong ground motions in the Tokyo metropolitan area during the 1923 Kanto earthquake using the stochastic Green’s function method. Source characteristics were modeled using seismic intensity inversion analysis, and path and site characteristics were modeled using inhomogeneous attenuation structure and empirical amplification factors. The results of these simulations were consistent with seismic intensities estimated based on the collapse rate of wooden houses. The distribution of pseudovelocity response spectra averaged at periods of 1–2 s was large: ∼200 cm/s in southern Kanagawa and southern Chiba prefectures, ∼100–200 cm/s in eastern Tokyo, and ∼50–100 cm/s in eastern Saitama prefecture despite its distance from strong-motion generation areas (SMGAs). The simulation results were regressed on site characteristics and fault distance, and the residuals were interpolated using the Kriging method to estimate detailed maps of seismic intensity and response spectra on an ∼250 m mesh reflecting site-specific characteristics. The following conclusions can be made: (1) all SMGAs, other than those in northern Tokyo Bay, were located near large slip areas based on coseismic geodetic and seismic waveform data. Although the SMGAs in the northern part of Tokyo Bay exerted little influence on the southern part of the Kanto region, their consideration was required to reproduce the seismic intensity at the northwest Tokyo and Saitama; (2) intense strong motion in central Tokyo occurred at the back marsh, delta, coastal lowlands, and filled lands, whereas low levels of strong motion were determined at terraces covered with volcanic ash soil. Combined with building distribution, this indicates areas of high seismic risk; (3) the seismic intensity and response spectra in the Tokyo metropolitan area obtained through this simulation were larger than those obtained from seismic records of the 2011 Tohoku earthquake—the most recent megathrust earthquake.

Discrimination of Sayamakaori and Yabukita Which Are Original Plant Source of Japanese Green Tea and Identification of Specific Compounds for the Former by Nuclear Magnetic Resonance Metabolomics Techniques Combined with Isolation by Chromatography Methods

Camellia sinensis leaves are one of the most economically important crops, and various tea cultivars are available in Japan. In the present study, we compared the constituents of Camellia sinensis var. sinensis cv. Yabukita (“Yabukita”), a standard tea cultivar, and those of C. sinensis var. sinensis cv. Sayamakaori (“Sayamakaori”), grown in Saitama Prefecture, using proton nuclear magnetic resonance (1H-NMR) metabolomics technology. Principal component analysis and hierarchical cluster analysis of 1H-NMR spectroscopic data of the MeOH extracts of C. sinensis leaves revealed differences in the metabolic profiles of each tea cultivar. Chromatographic separation based on 1H-NMR spectral data showed that kaempferol 3- O-β-D-glucopyranosyl-(1 → 3)-α-L-rhamnopyranosyl-(1 → 6)-β-D-glucopyranoside was a distinct component of “Sayamakaori”. This compound can be used as maker for the identification of “Sayamakaori” and the maintenance of its quality.

歴史的まちなみの屋外広告物における「相応しさ感覚」に着目した景観保全

This study focused on outdoor advertisements in Kawagoe City, Saitama Prefecture, that are not explicitly defined as norms, but have implicit rules based on the “sense of appropriateness” of people who are involved in urban development. In this study, the factors of the “sense of appropriateness” and the process of cultivating it were clarified. As a result, nine types and evaluation criteria based on the “sense of appropriateness” for the signage design were identified. In addition, the “sense of appropriateness” has been fostered through community development activities and has been changing with the times.

Model-based estimation of the health care expenditure and out-of-pocket payment for assisted reproductive technology: A retrospective linkage study using the Japanese national ART registry.

From April 2022, the Japanese government funding system for assisted reproductive technology (ART) has shifted from government subsidies to universal health insurance. To date, studies estimating the health care expenditure for ART are scarce. We estimated health care expenditures for ART cycles and compared the proportion of patients' out-of-pocket payment by ovarian stimulation protocols under the Japanese government subsidy system. We linked payment information for government subsidies in Saitama Prefecture during 2016 and 2017 with the Japanese ART registry. Health care expenditures for all treatment cycles in Japan during 2017 among women aged <43 years (n = 369 757) were estimated using a generalized linear model. We linked 6269 subsidy applications to the Japanese ART registry. The average treatment fee for a fresh cycle was 376 434 JPY (standard deviation = 159 581). However, significant variation was observed across ovarian stimulation protocols. The estimated health care expenditure for ART during 2017 was 101 278 629 888 JPY (920 714 817 USD), leading to a 0.24% increase in the national health care expenditure for fiscal year 2017. Fresh cycles accounted for 70% of the expenditure. The proportion of the average patient out-of-pocket payment for one treatment cycle was smaller for natural (0%) and mild ovarian stimulation using clomiphene citrate (4.5%-20.7%) than those of conventional stimulation (30.3%-32.4%). Health insurance coverage for ART would increase national health care expenditure by 0.24%. Under the subsidy system, the proportion of the average patient out-of-pocket payment was smaller for natural and mild ovarian stimulation than conventional stimulations.

Image Segmentation-Based Bicycle Riding Side Identification Method

This paper attempts to identify which side of the road a bicycle is currently riding on using a common camera for realizing an advanced bicycle navigation system and bicycle riding safety support system. To identify the roadway area, the proposed method performs semantic segmentation on a front camera image captured by a bicycle drive recorder or smartphone. If the roadway area extends from the center of the image to the right, the bicyclist is riding on the left side of the roadway (i.e., the correct riding position in Japan). In contrast, if the roadway area extends to the left, the bicyclist is on the right side of the roadway (i.e., the incorrect riding position in Japan). We evaluated the accuracy of the proposed method on various road widths with different traffic volumes using video captured by riding bicycles in Tsuruoka City, Yamagata Prefecture, and Saitama City, Saitama Prefecture, Japan. High accuracy (>80%) was achieved for any combination of the segmentation model, riding side identification method, and experimental conditions. Given these results, we believe that we have realized an effective image segmentation-based method to identify which side of the roadway a bicycle riding is on.

Analysis of Factors Causing Low Soybean Yield in Saitama Prefecture (Japan) and Proposal of Feasible Countermeasures

Analysis of Factors Causing Low Soybean Yield in Saitama Prefecture (Japan) and Proposal of Feasible Countermeasures

Factors affecting guardians' decision-making regarding the SARS-CoV-2 vaccine.

In Japan, the vaccination rate against the SARS-CoV-2 vaccine for children was low. Therefore, in this study we investigated the factors influencing guardians' decision-making regarding vaccination of their children. From November 1, 2022 to March 31, 2023, pediatric clinics, departments, and midwifery clinics in Saitama Prefecture requested guardians of children under the age of 15 to complete an online questionnaire. Responses were obtained from 894 guardians of children aged 6 months to 15 years; 142 had had one of their children vaccinated at least once and 629 had not had any of their children vaccinated. Among guardians who had not had any of their children vaccinated, "the Age of children" was significantly younger (p < 0.001) and "Prevalence" (p < 0.001), "Free vaccination" (p < 0.001), and "Intentions of national and local governments" (p = 0.005) were selected as reasons significantly less frequently in comparison to guardians who had vaccinated their children. "Japanese adverse reactions" (p < 0.001), "Japanese effectiveness" (p < 0.001), "Adverse reactions" (p < 0.001), "History of adverse reactions" (p < 0.001), and "Reputation of friends" (p = 0.006) were selected significantly more frequently by guardians who had not had any of their children vaccinated. Guardians who had had one of their children vaccinated at least once emphasized the importance of prevalence and free vaccination. On the other hand, guardians who had not had any of their children vaccinated placed particular importance on adverse reactions and the Japanese data on effectiveness. To guide the decision-making of guardians, it is necessary to quickly collect and publish data on adverse reactions and effectiveness, particularly in Japanese individuals, so that citizens can decide whether to vaccinate themselves and their children.

Development of a new quantification method of Sarcocystis cruzi through detection of the acetyl-CoA synthetase gene.

Sarcocystis cruzi is a member of the genus Sarcocystis, infecting bovine animals such as cattle and bison as intermediate hosts, and canids such as dogs and raccoon dogs as definitive hosts. Acute sarcocystosis of S. cruzi causes occasional symptoms in cattle, including weight loss, reduced milk production, abortions, and death, and similar to other Sarcocystis species can potentially cause food poisoning in humans when raw or undercooked infected cattle meat is consumed. Despite these issues, genetic information on S. cruzi is scarce, and there is no specific quantitative method for the detection and quantification of the parasite in infected cattle. In this study, we aimed to develop a method based on high-throughput sequencing of S. cruzi genome and transcriptome that specifically and quantitatively detects the S. cruzi acetyl-CoA synthetase gene (ScACS). Cardiac muscles were collected from slaughterhouses in Saitama Prefecture to obtain sarcocysts from which DNA and RNA were extracted for the high-throughput sequencing. Using the sequences, we developed a specific quantitative PCR assay which could distinguish S. cruzi ACS from that of Toxoplasma gondii by taking advantage of the differences in their exon/intron organizations and validated the assay with the microscopic counting of the S. cruzi bradyzoites. Thus, this assay will be useful for future studies of S. cruzi pathogenesis in cattle and for the surveillance of infected animals, thereby easing public health concerns.

North-to-South diversity of lipomycetaceous yeasts in soils evaluated with a cultivation-based approach from 11 locations in Japan.

To understand the species distribution, diversity, and density of lipomycetaceous yeasts in soil based on their north-to-south location in Japan, 1146 strains were isolated from soil samples at 11 locations from Hokkaido to Okinawa Prefecture and taxonomically characterized. Lipomycetaceous yeast strains were isolated efficiently from soil by selecting watery mucoid-like colonies on agar plates with nitrogen-depleted medium. Twenty-four (80%) of the 30 known species of the genus Lipomyces were isolated from the soil samples collected in Japan, including species recently proposed. Among the species isolated, L. starkeyi was the most predominant in Japan, except on Iriomote Island, Okinawa, and accounted for 60-98% of the isolated strains. Lipomyces yarrowii was the dominant species on Iriomote Island (64%). The second most dominant species were L. chichibuensis in Saitama Prefecture and L. doorenjongii from Yamaguchi to Okinawa Prefecture. The species diversity of lipomycetaceous yeasts was in Japan and the significant correlation with the latitude of the sampling sites was revealed.

An atypical surge in RSV infections among children in Saitama, Japan in 2021

BackgroundIn 2021, atypical seasonal respiratory syncytial virus (RSV) outbreaks were observed in several countries. However, the peak, duration, and severity of these outbreaks have not been assessed. MethodsData were collected from almost all facilities with pediatric wards in Saitama Prefecture, Japan. Variables included the weekly number of patients admitted with RSV infection, their age, and the number of patients who required intubation. The average weekly admission rates (number of patients admitted divided by the number of hospitals) were compared by pre-pandemic year (2018 and 2019) and 2021, using analysis of variance. ResultsIn 2021, 1354 patients were admitted with RSV infection. The median age of the patients was < 12 months. The admission rate peaked around week 30. The slope of the peak in 2021 was markedly steeper than in the previous years. The mean weekly admission rate did not differ significantly between 2018, 2019, and 2021 (p = 0.77). The proportions of intubated patients did not differ significantly over the 4 years (2018­2021, p = 0.68). ConclusionThe overall number of RSV admissions and intubation rate in 2021 were similar to those in pre-pandemic years.