Inspiration
Reigando Cave 霊巌洞
Reigando Cave is located in a sacred mountain where masters of the martial arts honed their minds and bodies since ancient times.
This cave is most famous as the location where the greatest swordsman and samurai, Miyamoto Musashi, retreated in his final five years to write The Book of Five Rings (五輪書). This book is the most important text on the strategy and philosophy of the samurai.