(第一) is a compound modifier phrase of Japanese origin, meaning number one, or first. In kanji, "dai" ("number") is 第 and "ichi" ("one") is 一. "Dai" is also defined "ordinal number marker." It is this feature that makes the phrase a modifier, or an adjective, describing a noun, as first. Number one functions in the same way. The phrase is also written without the hyphen, as daiichi. Dai-ichi is frequently used in proper names, hence capitalized; also Dai-Ichi and occasionally Dai Ichi. There is a sound-alike common first name with different spelling. Uses include but are not limited to: Fukushima Daiichi Nuclear Power Plant (or Fukushima Dai-ichi), a.k.a. Fukushima I Nuclear Power Plant (福島第一原子力発電所) (dai and ichi are the third and fourth characters) – a six-unit nuclear plant complex struck in the March 11, 2011 Tōhoku earthquake and tsunami Dai-ichi Life Insurance Co (第一生命保険株式会社) – the third largest life insurer in Japan by revenues Dai Ichi Daihoumaru Ship case (第一大邦丸事件) – a 1952 incident between the South Korean Coast Guard and the Japanese Dai Ichi Daihoumaru ship Dai-Ichi Kangyō Bank (第一勧業銀行) – was one of the largest banks in the world during the latter half of the 20th century Dai-ichi KōKū Kantai (第一航空艦隊) (dai and ichi are the first and second characters) – 1st Air Fleet of the Imperial Japanese Navy; amongst a number of military-unit names incorporating the phrase Dai-ichi Hōsō – The 1st Broadcast (第1放送) (dai is first character; ichi is the numeral "1" instead of 一) on Radio Nikkei carries general programs and horse racing from eastern Japan (hōsō; click link to edit listing) Dai-Ichi-dōri Station (第一通り駅) – a commuter station in downtown Hamamatsu city (dōri) Morioka Dai-ichi High School, a.k.a. Morioka First High School (盛岡第一高等学校) – is a public, coeducational, university preparatory high school in Morioka city, Iwate, Japan Daiichi Sankyo (第一三共株式会社) (Dai and ichi are the first and second characters) – a Japan-based major pharmaceutical company Daiichi Institute of Technology (第一工業大学) – a private university in Kirishima, Kagoshima, Japan Dai-ichi was the name of a professional Go tournament 1959–75 Related phrases Dai-ni (第二) means number two or second, using two parallel bars (二) or "2" for "ni"; also daini Examples Fukushima Daini Nuclear Power Plant, a.k.a. Fukushima II Nuclear Power Plant, (福島第二原子力発電所) (dai and ni are the third and fourth characters), Fukushima Dai-Ni Genshiryoku Hatsudensho, Fukushima II NPP, 2F or "Fukushima Daini" – a four-unit