I visited the cave Musashi lived in and wrote the book of 5 rings. Totally recommend it if you’re ever in kumamoto.
[https://rekishinihon.com/2018/06/14/miyamoto-musashi/?wref=tp](https://rekishinihon.com/2018/06/14/miyamoto-musashi/?wref=tp)
https://www.reddit.com/r/japan/comments/xrt91w/miyamoto_musashi/