Metropolitan Area Of Japan Research Articles

Young Citizens’ Perceptions of Informal Green Space - A Study of Japanese High School Student's Place Attachment and Desire to Live in Rural Areas

One of the Sustainable Development Goals (SDGs) adopted at the UN Summit in September 2015 includes the greening movement, in which ordinary citizens can actively participate. Goals 3, 11, 13, and 15 of SDGs contribute to health and well-being, sustainable cities and communities, measures against climate change, and protection of life on land, respectively. In this context, studies of urban green spaces have been conducted on greening movements. Most studies have focused on formally recognized green spaces such as parks, gardens, and forests. “Informal green spaces” refer to small plots of land covered with greenery such as grassy areas on roadsides, vacant lots, and vegetation beside railroad tracks and waterways; however, they are considered separate from formal green spaces. A previous survey of informal green space usage in Ichikawa City, Chiba Prefecture, showed that residents were aware of informal green spaces in their neighborhoods and viewed them as potential auxiliary green spaces. However, the study mainly focused on the elderly, and no studies have focused on youth from junior high or high school as the primary research target. Therefore, this study aimed to clarify whether the results from previous studies were relevant to younger generations and a broader range of cities.This study focuses on the cities near Ichikawa, located in the metropolitan area of Japan, urbanized with residential condominiums and other buildings. There are several formal green spaces, and interest in greenery is relatively high. We first surveyed the actual conditions of various informal green spaces in Chiba and recorded their location information and types. Based on the data obtained, a questionnaire on the use and evaluation of informal green spaces was designed, and the responses were collected using “Classi,” an ICT platform for students and teachers, from Ichikawa Gakuen’s students (junior high school to senior high school) and teachers.Green spaces can help to build a sustainable society by improving physical and mental health through exposure to nature, developing cities where people can continue to live, and reducing heat islands. The importance of formal and informal green spaces in cities has been highlighted in this study, which indicated that informal green spaces not only enrich people’s lives but also have the potential for new usage. This study emphasizes that in urban areas with many restrictions, informal green spaces play a complementary role to formal green spaces.

Heat-related deaths and ambulance transports after typhoon-triggered power outages: a quasi-experimental study in the metropolitan areas of Japan

Heat-related deaths and ambulance transports after typhoon-triggered power outages: a quasi-experimental study in the metropolitan areas of Japan

Telephone Triage for Emergency Patients Reduces Unnecessary Ambulance Use: A Propensity Score Analysis With Population-Based Data in Osaka City, Japan

BackgroundTelephone triage service in emergency care has been introduced around the world, but the impact of this service on the emergency medical service (EMS) system has not been fully revealed. The aim of this study was to evaluate the effect of telephone triage service for emergency patients on decreasing unnecessary ambulance use by analysis with propensity score (PS) matching.MethodsThis study was a retrospective observational study, and the study period was the 4 years from January 2016 to December 2019. We included cases for which ambulances were dispatched from the Osaka Municipal Fire Department (OMFD). The primary outcome of this study was unnecessary ambulance use. We calculated a PS by fitting a logistic regression model to adjust for 10 variables that existed before use of the telephone triage service. To ensure the robustness of this analysis, we used not only PS matching but also a multivariable logistic regression model and regression model with PS as a covariate.ResultsThis study included 868,548 cases, of which 8,828 (1.0%) used telephone triage services and 859,720 (99.0%) did not use this service. Use of the telephone triage service was inversely associated with the occurrence of unnecessary ambulance use in multivariate logistic regression model (adjusted OR 0.453, 95% CI 0.405–0.506) and multivariate logistic regression model with PS as a covariate (adjusted OR 0.514, 95% CI 0.460–0.574). In the PS matching model, we also revealed same results (crude OR 0.487, 95% CI 0.425–0.588).ConclusionsIn this study, we were able to statistically evaluate the effectiveness of telephone triage service already in use by the public using the statistical method with PS. As a result, it was revealed that the use of a telephone triage service was associated with a lower proportion of unnecessary ambulance use in a metropolitan area of Japan.

Community Nurses' Perspective on Barriers to Effective Utilization of Advance Care Planning for Terminal Care of The Elderly in The Home Environment in Japan: A Systematic Review and Synthesis of Qualitative Studies

Advance care planning (ACP) allows individuals to plan the health care which dignifies their personal values at the terminal phase of their illnesses. The Japanese government previously endorsed the concept of ACP in the guideline on end-of-life care and community nurses in Japan could play an increased role to improve its utilization by patients. The current study aimed to identify challenges surrounding ACP practice in the home environment in Japan from the community nurses’ perspectives. Semi-structured interview was performed on eleven community nurses working in metropolitan areas in Japan. Qualitative data was collected and analyzed using Braun & Clarke’s six-step framework of thematic analysis (2006). Five themes were identified as barriers to effective ACP utilization: complexity surrounding family power, informed consent and discussion, cultural influence, longer life versus better life, and absence of frameworks and guidelines. The first three themes were further subdivided into subthemes: imbalance in family power and family guilt, inadequate information for decision-making and ‘no one talk about it’, and traditional ways of thinking and taboo surrounding talking about death, respectively. The identified issues surrounding the current ACP practice in Japan were interconnected and reflective of the social, cultural, legal, and ethical aspects of life and care in Japan. This study highlighted the importance of respecting patients’ preferences in care, which should be additionally protected by establishing clear policy and legal frameworks on ACP

Erratum for "Impact of the First Wave of the COVID-19 Pandemic on New Applications for Long-term Care Insurance in a Metropolitan Area of Japan" [J Epidemiol 31 (6) (2021) 401-402

Erratum for "Impact of the First Wave of the COVID-19 Pandemic on New Applications for Long-term Care Insurance in a Metropolitan Area of Japan" [J Epidemiol 31 (6) (2021) 401-402

Transnational displacement by short‐term rentals in Japan’s depopulating society: Dilemma between rent gap emergence and inbound tourist accommodations

AbstractThe influence of the so‐called “Airbnb effect” on local housing markets has grown into a global concern for affordability crisis, gentrification, and displacement. We analyzed the impacts of short‐term rental (STR) on the rental housing market and explored the relative factors for the rent gaps in Tokyo and Osaka: two major metropolitan areas in Japan. This research builds upon the rent gap theory by Neil Smith and clarifies the rent gaps by following previous work. Our results demonstrate that landlords in Osaka, more depopulated with unoccupied housings, have already removed a significant number of residential rental units from the housing market, and those of Tokyo, less depopulated with less unoccupied housings, is likely to evict their tenants to shift more profitable touristic short‐term rentals when their long‐term rentals’ rent revenue decreases. We concluded that the rent gaps affected by the depopulated societal context require tougher limits on touristic short‐term rentals to mitigate “transnational displacement.” The future of community livability depends upon municipalities’ ordinance as well as their strategies: how to leverage unoccupied housing to survive an era of shrinking economy.

Backgrounds of public health nurses who encounter difficulties caused by cultural differences when providing maternal and child health services to foreign residents in a metropolitan area of Japan

Backgrounds of public health nurses who encounter difficulties caused by cultural differences when providing maternal and child health services to foreign residents in a metropolitan area of Japan

Resident Perception and Behavior Toward the Multi-Functionality of Rooftop Farms: Focus on Tokyo Metropolitan Area in Japan

Resident Perception and Behavior Toward the Multi-Functionality of Rooftop Farms: Focus on Tokyo Metropolitan Area in Japan

Impact of COVID-19 on cervical cancer screening in Japan: A survey of population-based screening in urban Japan by the Japan Society of Gynecologic Oncology.

To assess the impact of COVID-19 on cervical cancer screening. The Japanese Society of Gynecologic Oncology launched COVID-19 Task Force surveyed the municipalities in urban areas of Japan. Questionnaires were sent to 20 ordinance-designated cities and 23 wards of Tokyo metropolitan area in Japan via telephone and mail in January 2021. An additional survey was conducted in March and April 2021, counted the monthly checkups in 2020 and, as a control data, the number of monthly checkups in 2019. "The State of Emergency" between April 7 and May 25, 2020, included 13 prefectures. The data collected in this research involved the number of screenings only. The chi-square test was performed for statistical analysis. The number of cancer screenings from March to August, with May being the month with the lowest number of screenings, was less than 50% of that in the previous year. In particular, the drop in the number of cancer screenings in the "Prefectures operating under special safety precautions" was remarkable and significantly lower than that in other Prefectures. However, after August, the number recovered to the usual level, despite the second wave of the pandemic occurring nationwide. The initial "the State of Emergency" caused a significant decrease in the number of people receiving population-based screenings, but the recovery has been remarkable, and the total number is expected to be the same as in previous years. The initial "the State of Emergency" caused a significant decrease in the number of people receiving population-based screenings.

Trend of asthma prevalence among children based on regional urbanization level in Japan; 2006-2019.

Although it has been known that the prevalence of asthma tends to be higher among children in the metropolitan areas of Japan, trends of the prevalence with respect to the regional urbanization level has not been investigated in recent years. We investigated trends in the prevalence of asthma among children and air pollutant concentrations by regional urbanization levels using data from the School Health Statistics Survey in Japan from 2006 to 2019. We calculated the age-standardized prevalence of asthma for each year, gender, regional urbanization level, and annual percent change (APC). In addition, the slope index of inequality (SII) and relative index of inequality (RII) were calculated for evaluating disparity in age-standardized asthma prevalence depending on regional urbanization levels. Moreover, we calculated the mean of the annual average values by regional urbanization levels for sulfur dioxide (SO2), nitrogen dioxide (NO2), suspended particulate matter (SPM), carbon monoxide (CO), and photochemical oxidant (Ox) from 2006 to 2018. We found that the age-standardized prevalence significantly decreased in the periods in the metropolis for males and females, and the degree of the decrease was largest in the metropolis. Conversely, the age-standardized prevalence increased in towns and villages, and the APC was greater than zero. In addition, both the SII and RII showed significant decreasing trends in the study period, and the regional disparity shrank over the years. Moreover, concentrations of the air pollutants were highest in the metropolis throughout the years except for Ox, whereas the difference in the concentrations of NO2, SPM, and CO decreased between the metropolis and the other areas over the years. In conclusion, disparity in asthma prevalence depending on regional urbanization level decreased from 2006 to 2019, and there is a possibility that regional difference in trend of the air pollutants is related to the result.

Psychological impacts of the COVID-19 pandemic on one-month postpartum mothers in a metropolitan area of Japan

BackgroundThe coronavirus disease 2019 (COVID-19) pandemic has recently become the most important issue in the world. Very few reports in Japan have examined the impact of the COVID-19 pandemic on peripartum mental health. We examined the status of postpartum mental health before and during COVID-19 pandemic from a consecutive database in a metropolitan area of Japan.MethodsThe subjects were women who had completed a maternity health check-up at a core regional hospital in Yokohama during the period from April 1, 2017, to December 31, 2020. We collected the subjects’ scores for the Edinburgh Postnatal Depression Scale (EPDS) and the Mother-to-Infant Bonding Scale (MIBS) at 1 month postpartum. The subjects were divided into four groups (three Before COVID-19 groups and a During COVID-19 group). MANOVA and post-hoc tests were used to determine mental health changes in the postpartum period among the four groups.ResultsThe Before and During COVID-19 groups contained 2844 and 1095 mothers, respectively. There were no significant difference in the total scores of the EPDS and MIBS among the four groups. However, the EPDS items related to anxiety factors were significantly higher and the EPDS items related to anhedonia and depression factors (excluding thoughts of self-harm) were significantly lower in the During COVID-19 group.ConclusionThe EPDS scores changed in connection with the COVID-19 pandemic. Anxiety, which represent hypervigilance, was significantly higher and anhedonia and depression were significantly lower in the During COVID-19 group. Our results may reflect COVID-19-related health concerns and a lack of social support caused by the COVID-19 pandemic.

An integrated youth mental health service in a densely populated metropolitan area in Japan: Clinical case management bridges the gap between mental health and illness services.

A global movement, including in Asia, is seeking to establish integrated youth mental health services that provide early intervention in the continuum from mental health to mental illness. Clinical case management (CCM), in which a case manager becomes not only a coordinator of services but also a provider of psychosocial support, can establish a 'one-stop network' that supports youth in densely populated areas with various social resources. In 2019, we opened a community-based centre called 'SODA' in front of a metropolitan railway station, which was designed to be highly accessible, stigma-free and youth-friendly to provide CCM. We aimed to clarify its services and effectiveness of CCM. Data from 105 youths were investigated in a case-controlled study, dividing them into two groups: those who had received CCM for 6 months, and those whose needs were met in fewer sessions. Twenty-one subjects who received CCM for 6 months had difficulties in more domains than the others. The mean of the total service minutes for the subjects who received CCM for 6 months was 491.3 min: psychological support (accounted for 24.8% of the time), support for community living (31.2%), work support (13.8%), family support (10.5%) and support for cooperation with other organizations (19.8%). Global Assessment of Functioning (GAF) score improved significantly, from 46.6 at baseline to 59.3 at 6 months. Even in metropolitan areas with numerous medical facilities, young people can face high barriers to access. CCM can be effective as an early intervention for subjects developing mental illness.

<b>Prediction Method of Train Delay Using Deep Learning Technique</b>

Commuter lines in metropolitan areas in Japan suffer frequent short train delays. Train dispatchers reschedule operations according to these delays and how they evolve. However, because of the complex way in which they evolve, it is difficult to predict delays of up to a few tens of minutes. To build an accurate prediction method, we developed prediction method using a deep learning model called Long Short Term Memory. This paper reports on the prediction performance of this method compared with the conventional method using neural networks.

Retrieval of Aerosol Optical Thickness with Custom Aerosol Model Using SKYNET Data over the Chiba Area

The retrieval of the aerosol optical thickness (AOT) from remotely-sensed data relies on the adopted aerosol model. However, the method of this technique has been rather limited because of the high variability of the surface albedo, in addition to the spatial variability in the aerosol properties over the land surfaces. To overcome unsolved problems, we proposed a method for the visibility-derived AOT estimation from SKYNET-based measurement and daytime satellite images with a custom aerosol model over the Chiba area (35.62° N, 140.10° E), which is located in the greater Tokyo metropolitan area in Japan. Different from conventionally-used aerosol models for the boundary layer, we created a custom aerosol model by using sky-radiometer observation data of aerosol volume size distribution and refractive indices, coupled with spectral response functions (SPFs) of satellite visible bands to alleviate the wide range of path-scattered radiance. We utilized the radiative transfer code 6S to implement the radiative transfer calculation based on the created custom aerosol model. The concurrent data from ground-based measurement are used in the radiative analysis, namely the temporal variation of AOT from SKYNET. The radiative estimation conducted under clear-sky conditions with minimum aerosol loading is used for the determination of the surface albedo, so that the 6S simulation yields a well-defined relation between total radiance and surface albedo. We made look-up tables (LUTs) pixel-by-pixel over the Chiba area for the custom aerosol model to retrieve the satellite AOT distribution based on the surface albedo. Therefore, such a reference of surface albedo generated from clear-sky conditions, in turn, can be employed to retrieve the spatial distribution of AOT on both clear and relatively turbid days. The value for the AOTs retrieved using the custom aerosol model is found to be stable than conventionally-used typical aerosol models, indicating that our method yields substantially better performance.

Determining desire to live among patients with advanced hepatobiliary-pancreatic cancer for whom curative treatment is not indicated.

This study aimed to evaluate the desire to live among patients with advanced hepatobiliary-pancreatic cancer who were excluded from radical treatment and to examine the ideal nursing support for them. We recruited 18 patients in a department specializing in the treatment of hepatobiliary-pancreatic cancer at a university hospital in the metropolitan area of Japan. We included those with advanced hepatobiliary-pancreatic cancer who received a treatment other than definitive treatment. We conducted semi-structured interviews, and the responses were analyzed qualitatively and descriptively. Events experienced by patients with advanced hepatobiliary-pancreatic cancer and out of indication for radical treatment were divided into five major phases, while desire to live was divided into 11 categories. Two of these categories were represented by the word "death". The desire to live was present in all phases, and the expressions of these desires were diverse. Patients suppressed expressing their desire to live because they understood that their situation was challenging. In addition, there was a tendency to avoid expressing their desire to live to medical staff and their families. We found that nurses need to establish a medical relationship in which patients can express their desire to live and become connected to nursing support.

High Potential of Asian Dust to Act as Ice Nucleating Particles in Mixed‐Phase Clouds Simulated With a Global Aerosol‐Climate Model

AbstractMineral dust affects the microphysical and radiative properties of mixed‐phase clouds and hence the radiative balance of the Earth by acting as ice nucleating particles (INPs). However, the importance of Asian dust as INPs is not well understood. In this study, we examined the contribution of Asian dust to global dust INPs and its effect on cloud radiative forcing (CRF) using a global aerosol‐climate model with an ice nucleation parameterization that links INP number concentrations to ambient temperature and dust number concentrations. Our model well reproduces INP number concentrations measured over the Tokyo Metropolitan area in Japan during May 2017, when Asian dust was transported to Japan. Our simulation for the years 2013–2017 shows that Asian dust extends from its source regions (e.g., the Gobi and Taklimakan Deserts) to the North Pacific, North America, and the Arctic. Notably, Asian dust is transported to higher altitudes (i.e., to temperature regimes relevant for the formation of mixed‐phase clouds) more efficiently than dust from other regions. The annual‐mean simulated contribution of Asian dust to global dust INPs is 15%, which is 4.4 times higher than its contribution to global atmospheric dust loading (3.4%). These characteristics of Asian dust show its high potential to act as INPs in mixed‐phase clouds. Sensitivity simulations show that Asian dust INPs have a positive net CRF of 0.054–0.19 W m−2 in East Asia and the North Pacific during 2013–2017 (cf. 0.092–1.0 W m−2 for dust from other regions).

Impact of the First Wave of the COVID-19 Pandemic on New Applications for Long-term Care Insurance in a Metropolitan Area of Japan

Impact of the First Wave of the COVID-19 Pandemic on New Applications for Long-term Care Insurance in a Metropolitan Area of Japan

Visualization of the seasonal shift of a variety of airborne pollens in western Tokyo

Airborne pollens cause pollinosis and have the potential to affect microphysics in clouds; however, the number of monitored species has been very limited due to technical difficulties for the morphotype identification. In this study, we applied an eDNA approach to the airborne pollen communities in the suburbs of the Tokyo metropolitan area in Japan, within a mixed urban, rural, and mountain landscape, revealing pollen seasonality of various taxa (a total of 78 families across the period) in the spring season (February to May). Those taxa distinctly shifted in the season, especially in the beginning of February and the middle of April. Air temperature shift was an obvious key factor to affect the airborne pollen community, while the influence of other meteorological factors, such as wind speed, humidity, and precipitation, was not clear. Taxonomic classification of major Amplicon Sequence Variants (ASVs) indicates multiple pollen sources, including natural forest, planted forest, roadside, park lands, and horticultural activities. Most major ASV belongs to Japanese cedar (Cryptomeria japonica), which is the most notable allergen that causes pollinosis in Japan, peaking in mid-February to March. Backward trajectory analysis of air masses suggests that the Japanese cedar and other Cupressaceae plantation forests in the western mountains were a significant source of airborne pollen communities detected at our sampling site. Other major plant pollen sources, including Japanese zelkova (Zelkova serrata) and ginkgo (Ginkgo biloba), emanated from the nearby parks or roadside regions. This study's approach enables us to visualize the phenology of multiple pollen, including timing and duration. Long-term monitoring of this type would provide additional insight into understanding the role of climate change on pollen transmission and links to flowering events.

Dental implant status in elderly individuals requiring domiciliary dental care in Japan

BackgroundThe presence of implants is a significant burden not only for dentists but also for caregivers and families of elderly individuals requiring nursing and domiciliary dental care. However, few reports have assessed the status of domiciliary dental care or measures employed to deal with related issues. Hence, we aimed to evaluate the dental implant status in elderly patients requiring nursing and domiciliary dental care and to determine the suitable measures for overcoming the associated limitations. A questionnaire was mailed to 1000 dentists who provided domiciliary dental care in the Tokyo metropolitan area of Japan. The questions were classified into three categories: basic information of the dentists, actual implant status of patients requiring domiciliary dental care, and implants in an aging society.ResultsThe response rate was 36.5%. Approximately 2% of patients requiring domiciliary dental care were implant patients. Many implant-related problems were associated with insufficiency or difficulty in cleaning around the implant, resulting in peri-implantitis. Prosthetic and more serious complications such as implant body fracture or loss were reported and frequently managed by routine follow-ups, cleaning the area around the implant, scaling and polishing, and/or pharmacological modalities. Oral care mainly involved simple toothbrushing instructions, which was not adequate.ConclusionsOur findings suggest the necessity of simplifying the oral environment and making oral care a simple task before aging individuals require nursing and domiciliary dental care.

Association between Experience of Pet Ownership and Psychological Health among Socially Isolated and Non-Isolated Older Adults.

Simple SummaryThe COVID-19 pandemic may have accelerated social isolation, particularly of older adults who are at increased risk of severe illness, while practicing physical distancing and self-quarantine. This study conducted in a metropolitan area of Japan hopes to provide stronger cross-cultural evidence of the positive impact of pet ownership on the psychological health of socially isolated owners with its large sample of older adults comparing two types of pet ownership (i.e., dog or cat). In this study, experience of dog or cat ownership and the presence or absence of social isolation were categorized into four groups to compare psychological health of each group. After adjusting for demographic and potential confounders, we found that socially isolated older adults who never owned a dog were more likely to report lower psychological health in comparison to socially isolated current or past dog owners. Our findings have practical implications that pets, particularly dogs, can play a role in increasing opportunities for engaging in physical and social activities and providing emotional support and thereby reducing a sense of social isolation and loneliness and improving psychological health among older adults.The psychological health effects of pet ownership have been widely studied, but only a few studies investigated its impact among socially isolated older adults. The present study aims to investigate the psychological health of older adults with or without the experience of pet (i.e., dog or cat) ownership who are socially isolated or not socially isolated. This study used cross-sectional data from 9856 community-dwelling older adults in a metropolitan area of Japan. Social and non-social isolation and type of pet ownership (i.e., dog or cat) were stratified to examine the psychological health. Logistic regression models indicated that, after adjusting for demographic and potential confounders, socially isolated older adults who never owned a dog were 1.22 times more likely to report lower psychological health in comparison to socially isolated current or past dog owners. No such difference was observed among cat owners. The results suggest that the experience of dog ownership may be effective to improve the psychological health among socially isolated older adult.