The 5th Symposium of International Waste Working Group – Asian Regional Branch (IWWG-ARB) is a forum to provide an academic discussion to encourage and support economic and ecological (sustainable and integrated) waste management worldwide and to promote scientific advancement in the field. This symposium was held at Mercure Hotel, Nusa Dua, Bali, Indonesia, starting from 6th to 8th March 2023. More challenges emerge in a current more volatile, uncertain, complex, ubiquity environment, so it needs innovation and new approach. Innovation and a new approach to overcoming challenges should also be informed for decision-makers, aimed at influencing legislation, education, or providing practical applications. This purpose will be accomplished by learning from the past and analyzing the present, so that it will develop new ideas, scenarios, and visions for the future.With those objectives, the IWWG was conceived as a think tank based on scientific principles but essentially application-oriented. In addition, the IWWG has a light, non-bureaucratic organization which allows us to focus on a variety of subjects, react efficiently to relevant problems in the field of solid waste management, and communicate effectively within the professional community. We would like to thank the keynote and invited speakers for their contributions to this symposium. The following is:Prof. Pinjing He (Tongji University, China)Prof. Jae Young Kim (Seoul National University, Republic of Korea)Prof. Agamutu Pariatamby (Sunway University)Prof. Evangelos Gidarakos (IWWG President)Dr. Costas Velis (University of Leeds, UK)Prof. William Clarke (University of Queensland, Australia)Prof. Sandyha Babel (SIIT Thammasat University)Dr. Benno Rahardyan (Bandung Institute of Technology)The entire organizing committee that made this event successful was:List of Organizer, Outline of Committee are available in this Pdf.