Arty Party is an instrumental electro swing track by Japanese composer yaseta, originally released in 2013 and later included as a playable song in maimai でらっくす Splash. The track is built around a brisk 180 BPM tempo, pairing syncopated swing rhythms with bright synth leads and a driving dancefloor groove, a style that reflects yaseta's broader body of work blending electronic production with jazzy, funk-inflected sensibilities. The song first appeared on yaseta's debut album Funky Scape Movement (2013) and was later revisited in a remastered form on his album Day by day. A companion piece titled Arty Crafty shares the same melodic DNA, suggesting a small suite of related compositions within yaseta's catalog. In maimai, Arty Party was introduced as an unlockable track during the Splash version's irasutoya Area event (いらすとやちほー), requiring players to accumulate a total distance of 170 km to access it before becoming available by default in March 2021. Its chart arrangements were handled by two different note designers: the Expert (11+) chart was crafted by サファ太 (Safata), while the Master (13+) chart was designed by しちみりこりす (Shichimirikorisu). The Master chart in particular stands out for its dense 814-note count with a heavy Tap emphasis (654 notes), making it a stamina-intensive challenge at the 13+ difficulty tier.