2021 in Japanese music

The year 2021 in Japanese music.

Debuting groups

 * ≠Me
 * AB6IX
 * ASP
 * Be First
 * Enhypen
 * Ho6la
 * INI
 * Itzy
 * Loona
 * Naniwa Danshi
 * NIK
 * Rocket Punch
 * Treasure

Debuting soloists

 * Miku Kobato (as Cluppo )
 * Takuya Eguchi
 * Ai Hashimoto
 * Masato Hayakawa
 * Miyu Honda
 * Marina Horiuchi
 * Elaiza Ikeda
 * Takanori Iwata
 * Reina Kondō
 * Marika Kōno
 * Kanako Momota
 * Hiroki Moriuchi
 * Takuma Nagatsuka
 * Yurie Neno as a member of Sweet Pop Candy
 * Miho Okasaki
 * Aguri Ōnishi
 * Anna Suzuki
 * Rie Takahashi
 * Wonho
 * Daiki Yamashita

Returning groups

 * Ajico
 * Funky Monkey Babys
 * Nirgilis
 * Rythem
 * TM Network

Returning soloists

 * Fullkawa Honpo
 * Yūzō Kayama
 * Noriyuki Makihara
 * Shiori Niiyama
 * Naoya Urata

Events

 * 72nd NHK Kōhaku Uta Gassen

Number-ones

 * Oricon number-one albums
 * Oricon number-one singles
 * Hot 100 number-one singles

Awards

 * 63rd Japan Record Awards
 * 2021 MTV Video Music Awards Japan

Disbanding

 * 100%
 * AŌP
 * Ayumikurikamaki
 * Blu-Billion
 * Cellchrome
 * CY8ER
 * Desurabbits
 * GFriend
 * Hotshot
 * Iz*One
 * Maison Book Girl
 * OnePixcel
 * Pink Cres.
 * Sakura Gakuin
 * V6

Retiring

 * Saki Shimizu
 * Chinami Tokunaga
 * Nana Yamada
 * Mika Sakaki as a member of Sweet Pop Candy

Going on hiatus

 * Gackt
 * Rikiya Higashihara
 * Kariyushi58
 * Maon Kurosaki
 * Silent Siren
 * Suchmos
 * Tokyo Performance Doll