[byw]

Even within China, the north (wheat-growing culture) is noticeably more individualistic than the south (rice-growing culture). The south is also significantly more traditional.

Japan and Korea, despite being in North-East Asia, are rice-growing, due to their oceanic climate. Culturally they are also closer to Southern China.

https://www.nature.com/articles/s41467-024-44770-w

One interesting result of the study is the culture change within one generation.