猫祭り (Neko Matsuri) is a high-energy, cat-themed festival song performed by Naru Hakobe (箱部なる), a member of the fictional band Irodorimidori (イロドリミドリ), voiced by the well-known seiyū M・A・O. The track was composed and written by Hige Driver, who also contributed other maimai favorites such as 回レ！雪月花 and oboro, with additional composition and arrangement by Tes. (Kouta Tsujiyama). The music video animation was handled by 鑓田(alpha complex). Originally debuting in CHUNITHM AIR PLUS, the song joined maimai on April 3, 2018 as part of the MiLK version, and later appeared in ONGEKI SUMMER as well. The song's lyrics playfully blend cat vocalizations, endless variations of "nyan" and "mya", with traditional Japanese festival call-and-response shouts like "wasshoi!" creating a carnival atmosphere that feels like a rowdy, adorable feline matsuri. Its irresistible energy helped the official music video become a breakout hit: with over 6.6 million views on YouTube, it stands as the most-viewed Irodorimidori song by a wide margin, far ahead of the second-place DETARAME ROCK＆ROLL THEORY at roughly 700,000 views. In Asian English releases of maimai, the song is listed with the romanized title Neko Matsuri and the credited artist Naru Hakobe (CV: M・A・O). The original maimai genre placement shifted over time: it was classified as ORIGINAL & JOYPOLIS during MiLK through FiNALE, became ORIGINAL in the early でらっくす era, and has been listed under ONGEKI & CHUNITHM from でらっくす PLUS onward.