Nihon no shakai hoshō shisutemu no jizoku kanōsei dēta ni motozuku genjō bunseki to seisaku teian = Sustainability of Japanese social security system : data-based fact findings and policy proposals - Takahashi, Tai 1959-; Yamada, Atsuhiro ca. 21. Jh; Ishii, Kayoko 1978-; Kimura, Shin 1975- (Chūō Keizaisha, 2022)