Kirk here. This is an event that started today (Saturday) and ends tomorrow. Here’s a TV report from RKK:

https://newsdig.tbs.co.jp/articles/rkk/385265?display=1

The venue is Hanabata Hiroba (downtown, near the castle). I looked for information in English but couldn’t find any. The following Hanabata Hiroba website doesn’t have any links to English. How are tourists supposed to know that there’s something to see?

https://hanabatahiroba.jp/event-information/679/