Triplet was announced in March 2014 through a single announcement. It was formed alongside the groups Sato no Akari and ODATOMO to be part of the Hello! Project SATOYAMA Movement, a movement that aims to remind Japan of their beautiful countrysides (Satoyama) and the need to conserve them.
- [2014.04.23] Aa, Subarashiki Hibi yo / Dream Last Train / Kodachi wo Nukeru Kaze no You ni (嗚呼、素晴らしき日々よ / 木立を抜ける風のように) (Sato no Akari, Triplet, ODATOMO)
Compilations / Other
- [2014.12.10] Hello! Project - Petit Best 15 (#13 Dream Last Train)