noun:

• two-way switch (UK); three-way switch (US) ➜ 片切スイッチ【かたぎりスイッチ】・４路スイッチ【よんろスイッチ】

noun:

• triplet - Music term ➜ 三連符

noun:

• yellow stem borer (species of moth, Scirpophaga incertulas)

expression:

• a student must never forget to honor their teacher (honour) - proverb ➜ 三尺去って師の影を踏まず

noun:

• obstetrician

noun:

• recruit (former rank in the JSDF) - obsolete term

noun:

• oxygen mask

noun:

• in the mountains; among the mountains

noun:

• three-storied pagoda

noun:

• Japan's Three Holy Mountains (Mt. Fuji, Mt. Tate and Mt. Haku) - abbreviation ➜ 日本三霊山【にほんさんれいざん】

noun:

• sense of participation

noun:

• Sanzu River (Buddhist equivalent of the River Styx) - Buddhism term

noun:

• use association - IT term

noun:

• oxygen tent

noun:

• petty underling; small fry

noun:

• magnus hitch

noun:

• arsenic trioxide; white arsenic (As2O3) - Chemistry term ➜ 亜ヒ酸
• arsenic pentoxide (As2O5)

noun:

• coal mining

noun:

• second cousin ➜ はとこ・又従兄弟【またいとこ】

noun:

• diffuse nebula - Astronomy term

noun:

• three-digit number; hundreds column

noun:

• the Three Urban Prefectures

noun:

• a row of training matches with the same opponent - Sumo term

noun:

• mountaineering club
• mountain area

noun:

• silkworm