大西洋標準時 たいせいようひょうじゅんじ Meanings Noun Atlantic Standard Time; AST Kanji 大 big. Read as タイ. 西 west. Read as セイ. 洋 ocean. Read as ヨウ. 標 mark. Read as ヒョウ. 準 standard. Read as ジュン. 時 time. Read as ジ. Jinuma: Japanese Dictionary · Word lists