(dated) the Japanese language / a Japanese word of ancient Japanese origin, such as 見る (miru, “to look, to see”), 光 (hikari, “shining, brightness”), or 桜 (sakura, “cherry tree, cherry blossom”)

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

(archaic) antique, old-fashioned / (colloquial) ancient

ancient times, antiquity, remote ages

a piece of research, a study, investigation

to research, to study

everything

(colloquial) current boyfriend