Jupiter (idol unit)

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This article is about a idol unit featuring Touma Amagase, Shouta Mitarai, and Hokuto Ijuuin. For other uses, see Jupiter (disambiguation).
Jupiter (idol unit)
315 Jupiter Logo.png
General Unit Data
Original Unit Name: Jupiter
Translated Unit Name: Jupiter
Unit Members: Touma Amagase
Shouta Mitarai
Hokuto Ijuuin
Producer: Shizuka Sanjouba (Previous)
Producer (Current)
Production Agency: 961 PRO (Transferred)
315 PRO (Current)
Debuted in: THE iDOLM@STER 2
Image songs: Alice or Guilty
Koi o Hajimeyou
Planet scape
Weiβ Schwarz TCG Cards

Jupiter was first announced at Tokyo Game Show on September 18th, 2010. This was another one of Takao Kuroi's projects to defeat 765 productions; utilizing male idols instead of female idols. Much like Project Fairy, another unit of 961 Productions, Jupiter was also tricked by President Kuroi into believing 765 Productions was corrupt. They debuted with the song Alice or Guilty in the costume "Blackish 961SP". A later song, Koi o Hajimeyou, was also sung by the group in addition to a new costume: "Weiss Jupiter".

After the events of the anime, Jupiter broke away from 961 Production and joined 315 Production.


In THE iDOLM@STER 2, Jupiter appeared as a rival group, with its members especially focused on crushing 765 Production's idols. This was because of all the lies of corruption and cheating that President Kuroi had told them about 765 due to his rivalry with their president, Takagi. This did not stop until Kuroi's lies were revealed after a loss against a 765 unit when Touma decided to disband the unit because of his realization that Jupiter where the ones that were corrupted and operating in a wrong way. Shouta thought it was a bit of a shame but he agreed with Touma's decision, and so did Hokuto.

Following their defection from 961 Production, they performed as freelancing idols for a year, constantly getting offers from companies eager to capitalize on Jupiter's popularity. They reject all of them, but cannot shake off the advances of one Takashi Saito, president of the then small 315 Production. Eventually, they agree to sign on for 315 due to Saito making clear that he wants to focus on what Jupiter feels is right moving forward.


In Game

  • THE iDOLM@STER 2 - Project Jupiter debuts as in-game rivals to 765 Production.
  • THE iDOLM@STER SHINY FESTA - Jupiter participates in the International Island Music Festival Competition, becoming a rival of the 765 PRO idols. They are SSS rank, making them the unit to beat.
  • THE iDOLM@STER ONE FOR ALL - Jupiter appears as Rank Up Festival Rivals at Ranks B separately from Shouta to Touma and S2 as a unit, making them rivals of 765 PRO. They're not be played in S4U! mode.
  • THE iDOLM@STER: SideM - Project Jupiter is defected to 315 Production.
  • THE iDOLM@STER SideM: LIVE ON ST@GE! - Jupiter still affiliates with 315 Production, but they are given newer, more streamlined outfits instead of the ones they had in the original SideM game. These outfits are their current canon costumes in all subsequent SideM media, including in the anime.

CD Recordings

In Adaptations


Character Gallery

  1. https://twitter.com/sidem_eng/status/847665095186333697 SideM Otomedia interview