“…Although Japan can be considered as one ideal case for gerontological studies as discussed earlier, the generalizability of its implications to other countries should be carefully examined in consideration of sociocultural commonalities and differences that may affect life satisfaction of older adults and beyond. This includes, but is not limited to, social policy/security (i.e., the extent to which older adults are socio-economically supported), the degree of gender (in)equality (i.e., how older women and men are (un)equally treated in a society), the extent of social connectedness ( Cornwell et al, 2008 ), the rewards allocation mechanisms linked to the aggregate skills level ( Araki, 2022 ), and their interactions with individual-level attributes (i.e., compositional effects). In so doing, variables should also be extended to, for example, other types of SWB (e.g., hedonic and eudemonic happiness; negative dimensions of mental health), genetic factors, time use, objective measures for health and relationships, and attitude toward vaccination ( Bhagianadh & Arora, 2022 ; Callow & Callow, 2021 ).…”