adverb, takes genitive case の

  1. one-by-one, separately, in detail.

Variations

Pronunciation Kanji Kana Is Common
 
 
一つ一つ ひとつひとつ
 
 
1つ1つ ひとつひとつ
 
 
 
 
一つひとつ ひとつひとつ

Contained Kanji Breakdown

one, one radical (no.1)
イチ いっ ひと- (1st, N5)