history (branch of knowledge that studies the past)

bryology

Short for 宋明理学 (Sō-Min rigaku, “Neo-Confucianism”). / (obsolete) Synonym of 哲学 (tetsugaku, “philosophy”) / Clipping of 物理学 (butsurigaku, “physics”).

Kyūjitai form of 政治学: political science

(music) gagaku (the ancient court ritual classical music of Japan, of Chinese and Korean origin)

Kyūjitai form of 史学 (“history”)

(botany) sepal

Western music, especially Western popular music

physiology

Kyūjitai form of 生理学 (physiology)