Kirk here. I’m a fan of Yamaga. There’s a big festival there this week (15th and 16th). If you can make it, the details for this year are spelled out in Japanese here:
https://yamaga-tanbou.jp/wp-content/uploads/2024/06/bb3f3c2242242840c9d4b6ad87c36a1c.pdf
An general overview of the festival in English can be found here:
https://www.japan.travel/en/spot/458/
And here’s the article that prompted me to post about Yamaga today:
https://japannews.yomiuri.co.jp/society/general-news/20240811-204258/