Japan criminalizes the use of cannabis, up to 7 years in prison for using.

https://mainichi.jp/english/articles/20241212/p2g/00m/0na/014000c

"In 2023, a record 6,703 people were investigated in criminal cases involving cannabis in Japan, surpassing the number of methamphetamine cases for the first time, the Health, Labor and Welfare Ministry said. Seventy percent of cases involved those under the age of 30.

A nationwide survey conducted the same year by a research group of the ministry estimated that some 200,000 people had used marijuana in the past year."