ようかい体操第一 (Youkai Taisō Dai Ichi, "Monster Exercise No. 1") is the first ending theme for the TV anime 妖怪ウォッチ (Yo-kai Watch), performed by the Japanese dance-and-vocal group Dream5. Upon its release in 2014, the song became a cultural phenomenon in Japan, particularly among children, thanks to its simple dance choreography that accompanied the TV broadcast and was widely emulated in schools and playgrounds across the country. The track was added to maimai as part of the PiNK PLUS update on August 11, 2016, placed in the POPS&アニメ (POPS & Anime) genre category. Its in-game play background uses the anime's original ending animation, featuring characters from the Yo-kai Watch series performing the signature dance sequence. The song was delisted from the maimai arcade lineup on June 21, 2018, consistent with typical licensing expiry for anime tie-in songs. Outside maimai, ようかい体操第一 also appeared in other rhythm games such as Taiko no Tatsujin, reinforcing its status as one of the most recognizable anime-associated songs of the mid-2010s. The maimai Master chart (level 8+, constant 8.6) features a Slide-note count of 55, an unusually high number for its level bracket in the PiNK PLUS era, likely designed to evoke the song's dance-oriented movements through sweeping slide patterns.