training in seclusion on a mountain

to train in seclusion on a mountain

wastepaper basket

silver-stripe round herring, blue sprat, kibinago; a small marine fish, Spratelloides gracilis

coding theory

adamantine strength: / the firmness of one's own spirit, and the strength of one's own spiritual power. / (figuratively, literally) something extremely hard, of extreme strength.

(Buddhism) a square- or octagonal-sided walking stick used by practitioners of 修験道 (Shugendō) or pilgrims / (Buddhism) a vajra (ritual club) possessed by a yaksha

in all directions

twenty-fifth day of the month

(historical) researchers who were employed by Tokugawa shogunate and studied Japanese and/or Japan-related history (Japanology).