Kirk here with a bit more about the Yamaga Lantern Festival. The screenshot is from the following page:
https://yamaga-tanbou.jp.e.zh.hp.transer.com/about/toromatsuri/
This is an automatic translation of the two-day schedule that has been published in Japanese:
https://yamaga-tanbou.jp.e.zh.hp.transer.com/about/toromatsuri/
Check it out for yourself. There will be fireworks on the 15th.
Please be careful about crowds and parking. I can’t provide compete details here so, if you’re planning to go, please try to do some research on your own. If you find out anything you think would be valuable for others, please share it in a comment.