According to this article, construction of a large solar park is beginning in Yamaga.
A map included in the following Wikipedia article indicates that Kyushu has high potential for solar energy production:
https://en.wikipedia.org/wiki/Solar_power_in_Japan
A year or so ago, however, it looked like the Japanese government was trying to put the brakes on Japan’s solar energy boom:
At any rate, I’m glad to see renewable energy being developed here.
– Kirk
https://renewablesnow.com/news/smart-solar-breaks-ground-on-345-mw-solar-park-in-kumamoto-579294/