Translation guide
A social event where participants dress in costume (cosplay) and dance, often to anime, game, or Vocaloid music. This is a niche subculture term; there is no single standard Japanese equivalent. The most natural way to express it depends on context.
Referring to a party or gathering where people cosplay and dance, often to otaku-related music.
A direct loanword phrase that is widely understood in otaku circles. It clearly conveys the concept of a cosplay dance party.
今週末、コスプレダンスパーティーがあるんだ。
There's a cosplay dance party this weekend.
Used when the main focus is cosplay, but dancing is included as an activity. Adding （ダンスあり） clarifies the dance element.
そのコスプレイベントはダンスありだって。
I heard that cosplay event includes dancing.
Refers to an anime song club event where cosplay is allowed. This is more specific to club nights featuring anime music.
アニソンクラブイベントでコスプレして踊った。
I cosplayed and danced at an anime song club event.
A casual meetup focused on dancing in costume, often outdoors or in rented spaces.
An offline meetup (オフ会) for cosplayers that involves dancing. Commonly used in social media event listings.
コスプレオフ会でダンスする予定です。
We're planning to dance at the cosplay meetup.
Literally 'tried dancing meetup,' this refers to gatherings where people dance to popular online choreography, often in cosplay. Strongly associated with Nico Nico Douga culture.
今度の踊ってみたオフ会で、この曲をやります。
We'll do this song at the next dance meetup.
Referring to a well-known cosplay dance event like 'Cosplay Dance Party' at conventions.
If the event has an established name (e.g., 'Cosplay Dance Party @ Comiket'), use the katakana rendering directly. This is the most precise way.
コミケのコスプレダンスパーティーに参加した。
I joined the Cosplay Dance Party at Comiket.
直訳の「コスプレダンスパーティー」は通じますが、日本語として自然な表現は状況によって異なります。特にフォーマルな文脈では「コスプレイベント（ダンスあり）」のように説明的にすると良いでしょう。
コスプレダンスパーティー
cosplay dance party (literal, acceptable in casual otaku contexts)
If the event is primarily a dance event with cosplay allowed, use 「アニソンクラブイベント（コスプレ可）」. If it's a cosplay gathering with dancing, use 「コスプレオフ会（ダンス）」. Adjust based on the main activity.