What is the song playing in the prologue of episode 150 of One Piece?
The song that was played as intro in the episode 150 of One Piece was titled Hikari e.


  Kanji: ヒカリへ
  Romaji: Hikari e
  Meaning: Towards the Light
  English: Towards the Light
  Artist(s): The Babystars Album/Single: Hikari e
  Label: Ki/oon Records
  Track Length: 3:44
  Intro length: 1:49
  Anime Use: 3rd Opening: Episodes 116 - 168 (53 episodes)


More details about the song can be found on Wikia.