和暦: the traditional Japanese calendar

所念: (Classical Japanese, archaic) to seem, to appear, to look like / 所念: (Classical Japanese, archaic) to sound / 所念: (Classical Japanese, archaic) to be regarded as

Classical Japanese and literary form of 思う (omou, “to think”)

忍び: doing something secretly, travelling incognito; theft; ninjutsu, ninja

discreet, hiding one's identity

不忍: Shinobazu, a Japanese family name

篠笛: Japanese transverse bamboo flute

俊信: a male given name / 利信: a male given name

忍び入る: sneak into

think