JMdict: 1249910

にいさん 【にいさん】

  1. [n] older brother; elder brother
  2. [n] brother (as older-brother figure in friendly and or work relationship)
  3. [n] young man; buddy; fella; laddie
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Words often seen with this one: (experimental feature)

 (103), こと (67), わたし (61), ボク (43),  (34), もう (33), いる (33), いい (33),  (32),  (30),  (29), この (28),  (26),  (26), まで (26),  (24), 父さん (22), そんな (20), 大丈夫 (20),  (19), 姉さん (19), ありがとう (19), こんな (18), する (18), ママ (18)