2000年代 にせんねんだい Meanings Noun the 2000s (decade, i.e. 2000-2009); the '00s; the aughts; the noughties the 2000s (century, i.e. 2000-2099) the 2000s (millennium, i.e. 2000-2999) Kanji 年 year. Read as ネン. 代 era. Read as ダイ. Jinuma: Japanese Dictionary · Word lists