to train in seclusion on a mountain

(military, historical) a specially-organized attack force, the most notable being the kamikaze (suicide bombing) attack corps during World War II

a 家紋 (kamon, “family crest”) design featuring a star shape similar to a Star of David

falter, mumble

tōrō nagashi (the custom of floating paper lanterns down a river especially at the end of the Bon Festival)

(idiomatic) to do wholeheartedly; to put one's heart into something

It's difficult to make a life