I’ve been regularly attending weekly D&D sessions at one of the local game shops Role & Roll (Japanese) in Akihabara. These week day sessions run for two hours from 7pm to 9pm, but they also occasionally host events on the weekend, which usually run from 12pm to 8pm, at the latest.
These Adventurers League games are sponsored by the Japanese publisher of D&D Hobby Japan (Japanese). Interestingly, only the free basic rules (Japanese) have been officially translated. This leads to a mix of Japanese and English source materials at the table, both paper and digital.