Five steroids and two norsesquiterpene glycosides were isolated from the methanol extract of H. japonicus. Their structures were determined by means of physio-chemical and spectral data to be friedelin (1), stigmast-5-en-3-${eta}$-ol (${eta}$-sitosterol) (2), 7-keto-${eta}$-sitosterol (3), 6${eta}$-hydroxy-4-stigmasten-3-one (4), 7${alpha}$-hydroxy-${eta}$-sitosterol (5), 3-hydroxy-4,4-dimethyl-4-butyrolactone (6), daucosterol (7), (6S, 9S)-roseoside (8), and (9S)-drummondol-9-O-${eta}$-D-glucopyranoside (spinoside B) (9). The compounds 1, 3, 4, and 6 - 9 were first isolated from this plant source.