東証第一部 とうしょうだいいちぶ Meanings Noun First Section of the Tokyo Stock Exchange See also: 東証一部 (とうしょういちぶ). Kanji 東 east. Read as トウ. 証 proof. Read as ショウ. 第 No.. Read as ダイ. 一 one. Read as イチ. 部 part. Read as ブ. Jinuma: Japanese Dictionary · Word lists