ICT-Enabled Community-Based Social Support System Matrix for Elderly: A Social Support Perspective in Japan Topics: Health Geography, Cultural Issues; Self-Fulfilment and Social Participation ; Sociocultural Dimension of Aging Population; Systems to Encourage Healthy Lifestyles; Web and Mobile Interaction In Proceedings of the 9th International Conference on Information and Communication Technologies for Ageing Well and e-Health ICT4AWE - Volume 1, 102-109, 2023 , Prague, Czech Republic