Photo: Georges Seguin ( Okki ) · CC BY-SA 3.0 · credits
Tier 3 · vertical & regional
Tomomi Kasai
Person · female · Japan · Tokyo · born 1991 · recording since 2012
Japanese female talent, singer, YouTuber, businessperson (1991-)
official homepageofficial homepagesocialsocialsocialsocialdatabasedatabasedatabasevideo
Also known as 河西智美 · 河西智美
Timeline
3 events◦ Birth 1★ Debut release 1▣ Album 1
1990s
2010s
· Debut release
Debut release: まさか
First documented Single in the MusicBrainz discography.
source: musicbrainz
Biography
English biography329 words · 7 sectionssource: wikipedia-en · licence CC BY-SA 4.0 · revision 1371035809
Biography
Tomomi Kasai (河西 智美, Kasai Tomomi; born November 16, 1991 in Tokyo) is a Japanese singer, actress and a former member of the idol group AKB48, belonging to Team A. She had a recurring role on Kamen Rider W as Elizabeth, alongside group member Tomomi Itano. Together, they make up the sub-unit Queen & Elizabeth.
On November 10, 2012, it was announced she would be making her solo debut. On November 25, Kasai performed her solo song for the first time, the title announced as "Masaka" (まさか). It was released on December 26. On December 17, Kasai announced that she would leave the group. Her farewell ceremony was on May 3, 2013.
Personal life
She is the younger sister of former singer Rion Kasai.
On May 15, 2021, Kasai announced her marriage to acrobat gymnast and actor Keita Koyama. She gave birth to their first child, a daughter in 2022.
Solo singles
"Masaka" (まさか) (2012) - Sales: 44,982
"Mine" (2013) - Sales: 22,417
"Kietaikurai" (キエタイクライ) (2014) - Sales: 13,697
"Ima Sara Sara" (今さらさら) (2014) - Sales: 7,152
Theatre
Peter Pan (2018–2019) Wendy Darling
Annie (2020–2021) Lily St. Regis
Stage units
Team K 1st Stage: Hoshi no Ondo (星の温度)
Team K 2nd Stage: Kinjirareta Futari (禁じられた2人)
Team K 2nd Stage: Fushidara na Natsu (ふしだらな夏)
Team K 3rd Stage: Maria
Himawari Gumi 1st Stage: Idol Nante Yobanaide (アイドルなんて呼ばないで)
Himawari Gumi 2nd Stage: Tonari no Banana (となりのバナナ)
Team K 4th Stage: Oshibe to Meshibe to Yoru no Chouchou (おしべとめしべと夜の蝶々)
Team K 5th Stage: Dakishimeraretara (抱きしめられたら)
Team B 5th Stage: Candy (キャンディー)
Team A 2nd Stage: Nageki no Figure (嘆きのフィギュア) (May 28, 2005, replacing Atsuko Maeda)
Television
ICE: Aoi
Kamen Rider W: Elizabeth
Digimon Xros Wars: Bastemon (Voice)
Meshibana Keiji Tachibana (2013): Muranaka
Movies
Kamen Rider × Kamen Rider W & Decade: Movie War 2010 (2009) as Elizabeth
Kamen Rider W Forever: A to Z/The Gaia Memories of Fate (2010) as Elizabeth
Neck (2010) as Mao
Kamen Rider × Kamen Rider OOO & W Featuring Skull: Movie War Core (2010) as Elizabeth
Discography & profile
Normalised profile
Percentiles are computed over every artist in the database, so a tier-3 artist can still sit in the 95th percentile on a single axis.
| Metric | Value | Percentile |
|---|---|---|
| Wikipedia language versions | 15 | 72.5th |
| Spotify monthly listeners | — | no data |
| Release groups in DB | 5 | 78.9th |
| Studio albums | 1 | 76th |
| Awards recorded | 0 | 0th |
| Timeline events | 3 | 73.3th |
| Recording span (years) | 5 | 18.3th |
| Genres | 2 | 74th |
Percentiles are computed at render time; missing values mean the artist has no data on that axis.
Discography (5 release groups · 1 studio albums)
Albums · 1
2017 · studio album
Search SpotifySearch YouTube Music
Tracklist · 18 tracks · 51:40
Disc 11まさか4:472キャンディー4:283私のヒカリ4:234Mine4:255キエタイクライ3:436Touch Me!4:097今さらさら3:498助手席RAIN4:259最後のナミダ4:3010No Return4:4311STAR-T!4:1112ぎゅっと！4:07Disc 21まさか (Music Video)2Mine (Music Video)3キエタイクライ (Music Video)4今さらさら (Music Video)5STAR-T! (Music Video)6STAR-T! (Music Video メイキング映像)
Single · 4
| Cover | Year | Title | Notes | First release |
|---|---|---|---|---|
| 2012 | まさかSearch SpotifySearch YouTube MusicTracklist · 8 tracks · 37:491まさか4:50 2私のヒカリ4:24 3抱きしめられたら5:11 4キャンディー4:30 5まさか (off vocal)4:50 6私のヒカリ (off vocal)4:24 7抱きしめられたら (off vocal)5:12 8キャンディー (off vocal)4:28 | 26 December 2012 | ||
| 2013 | MineSearch SpotifySearch YouTube MusicTracklist · 9 tracks · 24:14Disc 1 1Mine4:28 2Illumination4:09 3僕の Summertime blues3:31 4Mine off vocal4:28 5Illumination off vocal4:09 6僕の Summertime blues off vocal3:29 Disc 21Mine Music Video 2Making of 「Mine」 3とも～みの Cooking チユウ | 8 May 2013 | ||
| 2014 | キエタイクライSearch SpotifySearch YouTube MusicTracklist · 8 tracks · 32:311キエタイクライ3:46 2Touch Me!4:09 3Lovely days4:17 4Blue...4:05 5キエタイクライ (off vocal)3:45 6Touch Me! (off vocal)4:09 7Lovely days (off vocal)4:17 8Blue... (off vocal)4:03 | 15 January 2014 | ||
| 2014 | 今さらさらSearch SpotifySearch YouTube MusicTracklist · 8 tracks · 32:371今さらさら3:52 2memory4:32 3それでも...4:30 4M・U・I・S・H・I・K・I3:26 5今さらさら (off vocal)3:52 6memory (off vocal)4:32 7それでも... (off vocal)4:30 8M・U・I・S・H・I・K・I (off vocal)3:23 | 17 September 2014 |
Stats & PK
Percentile within all 23,672 published artists.Put Tomomi Kasai head-to-head →
| Metric | Value | Percentile |
|---|---|---|
| Wikipedia language versions | 15 | 72.5th |
| Spotify monthly listeners | — | no data |
| Release groups in DB | 5 | 78.9th |
| Studio albums | 1 | 76th |
| Awards recorded | 0 | 0th |
| Timeline events | 3 | 73.3th |
| Recording span (years) | 5 | 18.3th |
| Genres | 2 | 74th |
Awards & honours
Line-up
| Name | From | To | Role |
|---|---|---|---|
| シスターラビッツ(band) | — | present | |
| 乃木坂AKB(band) | — | present | |
| OKL48(band) | — | present | |
| MINT(band) | — | present | |
| チームK(band) | 1 April 2006 | 21 May 2010 | original |
| チームB(band) | 21 May 2010 | 24 August 2012 | |
| A(band) | 24 August 2012 | 3 May 2013 |
Where this record comes from
portrait—Wikimedia Commons · CC BY-SA 3.0 · retrieved 11 October 2026
https://commons.wikimedia.org/wiki/File:AKB48_20090703_Japan_Expo_27.jpgaliases/urls—musicbrainz · CC0 · retrieved 10 October 2026
https://musicbrainz.org/artist/dd959a12-3b45-4fdd-be52-827796090ddfdiscography—musicbrainz · CC0 · retrieved 10 October 2026
https://musicbrainz.org/artist/dd959a12-3b45-4fdd-be52-827796090ddfcore—wikidata · CC0 · retrieved 10 October 2026
https://www.wikidata.org/wiki/Q1329748genre—wikidata · CC0 · retrieved 11 October 2026
https://www.wikidata.org/wiki/Q1329748seed-list—wikipedia · CC BY-SA 4.0 · retrieved 10 October 2026
https://en.wikipedia.org/wiki/Tomomi_Kasaibiography—wikipedia-en · CC BY-SA 4.0 · retrieved 10 October 2026
https://en.wikipedia.org/wiki/Tomomi_Kasai
Why this artist is in the database
- List of Japanese singers
Tier rule: curated genre/region list
Image: Georges Seguin ( Okki ) · CC BY-SA 3.0 · Wikimedia Commons
Wikidata: Q1329748 · MusicBrainz: dd959a12-3b45-4fdd-be52-827796090ddf
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