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was a Japanese idol trainee group that was managed by Avex Pictures. Despite being a unit since 2012, they never debuted, but they have promoted as Prism☆Box, which is a combination unit with Prizmmy☆.


Prism Mates originally started off as a 3 member trainee group consisting of Reina, Mia and Karin before their name changed to Prizmmy when Ayami joined. Later, a "short term" Prism Mates were created before an official line up was made after auditions. Yuka and Runa was a part of these "short term" Prism Mates.

They created a unit with Prizmmy called Prism Box in 2013 but Momona didn't promote it or appear much in the music video due to her young age (she was only 8 at the time).

They were paired up into duo's to create a duet but Momona was given her own solo song. New members, Airi and Sana, were added on December 23, 2013 after winning the Pretty Rhythm award in KiraChalle.

Hina joined Prizmmy but remained the leader of Prism Mates until May 2, 2015 when Runa graduated. Natsu became the leader and Yuka became the sub-leader. Their first group song "Zenshin Zenrei Go My Way" was released in Prizmmy's first mini album "Love Trooper". After Natsu and Kanon's graduation on April 29, 2016, Yuka became the leader while Mirei became the sub-leader.

For live performances, Glory Days was given to Sana as a solo with the rest of Prism Mates as back up dancers and Chocolate Paradise became a duet with Airi and Momona.

They announced their disbandment on December 9, 2016 and officially disbanded on March 31, 2017.



  • Dancing Doctor - Mirei and Kanon (November 6th, 2013)
  • Glory Days - Hina and Runa (November 6th, 2013)
  • Pojikaru World - Natsu and Yuka (December 11th, 2013)
  • Chocolate Paradise - Momona (February 14th, 2014)
  • Zenshin Zenrei Go My Way! (February 24, 2016)

In Prism☆Box


Current Members

  • Mirei Takahashi (Sub-Leader)
  • Yuka Takayanagi (Leader)
  • Momona Aoki (Youngest)
  • Airi Hamamura
  • Sana Ishii

Former Members

  • Mia Kusakabe (went to Prizmmy☆)
  • Karin Takahashi (went to Prizmmy☆)
  • Reina Kubo (went to Prizmmy☆)
  • Runa Suzuki (Graduated on May 2, 2015)
  • Hina Miyazaki (Graduated May 2, 2015; went to Prizmmy)
  • Kanon Hagino (Graduated April 29, 2016)
  • Natsu Usukura (Graduated April 29, 2016)


  • All members of Prizmmy (sans Ayami) were once part of PrismMates.
  • PrismMates' Mirei is Prizmmy's Karin's sister.
  • Despite being a part of Prizmmy, Hina was still considered a member of PrismMates before she officially graduated from Prism Mates along with Runa.


See Prism☆Mates/Video Gallery.