He’s aware that racing around public parks on a one-wheeled electric skateboard — while picking up trash using a samurai sword — is bizarre. But look, he says, he’s helping the environment.

SAMURAI WISDOM—DATE MASAMUNE— Despite losing an eye to illness, samurai Date Masamune crossed swords with powerful foes. Feared by all as the "One-Eyed Dragon," he built a vast domain, while ...