(phonology, orthography, grammar) the ninth row of the 五十音図 (literally “table of the fifty sounds”), consisting of the five kana ら/ラ (ra), り/リ (ri), る/ル (ru), れ/レ (re) and ろ/ロ (ro)

(phonology, orthography, grammar) the third row of the 五十音図 (literally “table of the fifty sounds”), consisting of the five kana さ/サ (sa), し/シ (shi), す/ス (su), せ/セ (se) and そ/ソ (so)

everything

(colloquial) current boyfriend

(slang) Alternative form of 彼氏 (kareshi, “boyfriend”)

everyone, one and all

a research student (i.e. a visiting or non-matriculating graduate student) / a researcher

researcher

a laboratory

researcher