Kirk here. As you know, the drama series “Shogun” has made quite a splash. It seems that it has added to already significant interest in samurai culture. This Japanese-language news report includes a section about foreigners who come to enjoy experiencing and learning at the “Kumamoto Musashi-Kan Dojo.”
https://news.ntv.co.jp/category/society/094d80cdf13e47b495b6a6166608d14e
Here’s an English-language article:
Become a samurai in Kumamoto! In an “Iai Experience”, learn about swordsmanship developed by Musashi Miyamoto https://kumamoto.guide/en/season/detail/174