an origin, cause / a type, class / an interest, appeal

a seed / a kind, type, sort, class, or category / (taxonomy) a species

one day

one, 1 / the first in order, foremost / the beginning / the best / a kind of; one of something / (card games) an ace / unity / the bottom string of a shamisen or other Japanese musical instrument

each person

unlined kimono

Synonym of 一夫一婦制 (ippuippusei, “monogamy”)

singles (in tennis)

(university slang) course that be got credit easily

Chanyu, chief of the Xiongnu.