Synonym of 三味線 (shamisen): a three-stringed musical instrument similar to a banjo played by plucking with a plectrum / a sanxian (fretless lute with three strings used in traditional Chinese music)

Kyūjitai form of 余弦

(colloquial) current boyfriend

everything

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

everyone, one and all

research & development; R&D

(education) research project, done by Japanese schoolchildren during summer break, to be presented upon return to school

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

research association; research society / group of enthusiasts (as may be found in schools, colleges, etc)