This map shows the government’s assessment of the possibility of a major earthquake (lower 6 on the JMA shindo scale) in the next 30 years.

Here’s an English article the prediction:

Risk of Huge Quake Stays High on Japan’s Pacific Side https://www.nippon.com/en/news/yjj2021032601019/risk-of-huge-quake-stays-high-on-japan%27s-pacific-side.html

– Kirk

https://www.nikkei.com/article/DGXZQOGG256ZJ0V20C21A3000000/