Hello! Project Wiki
Hello! Project Wiki

Teenage Solution / Yoshi Yoshi Shite Hoshii no / Beat no Wakusei (Teenage Solution/よしよししてほしいの/ビートの惑星; Teenage Solution / I Want You To Tell Me It's Alright / Beat Planet) is Morning Musume '21's 70th single. It was released on December 8, 2021[1] in 8 editions: 3 regular and 5 limited. The first press of the regular editions includes a random member trading card of 14 kinds depending on the jacket (42 in total), and one random shiny group card. The Limited Edition SP1 comes with a 28-page photobooklet, while the Limited Edition SP2 includes a download card for one of 14 Free Angle Video, filmed with 70 cameras, of a "Yoshi Yoshi Shite Hoshii no" solo dance shot video.

This was the last single to feature 10th generation member Sato Masaki.[2]

On November 25, 2021, it was announced that the release of the Limited Edition SP2 would be postponed due to production issues, but the single's release would remain on December 8 with the other editions.[3] On December 8, it was announced that the edition would be released on December 22.[4]

A Single V Blu-ray of "Beat no Wakusei" was available to pre-order for Hello! Project fanclub members from December 27, 2021 to January 28, 2022, and for advance pre-order at the UP-FRONT WORKS Web Store from January 12 to February 6, 2022,[5] with delivery estimated for late March. It will be subsequently released to the general public on April 13, 2022. It also includes a download card for one of 14 Free Angle Video of a "Yoshi Yoshi Shite Hoshii no" solo dance shot video.[6] And a 180° Group Dance video of Yoshi Yoshi Shite Hoshii no filmed with 31 cameras.



Morning Musume '21 - Teenage Solution (MV) (Promotion Edit)


Morning Musume '21 - Yoshi Yoshi Shite Hoshii no (MV) (Promotion Edit)


Morning Musume '21 - Beat no Wakusei (MV) (Promotion Edit)


Limited Editions A-C, SP2, Regular Editions[]

  1. Teenage Solution
  2. Yoshi Yoshi Shite Hoshii no
  3. Beat no Wakusei
  4. Teenage Solution (Instrumental)
  5. Yoshi Yoshi Shite Hoshii no (Instrumental)
  6. Beat no Wakusei (Instrumental)

Limited Edition SP1[]

  1. Teenage Solution
  2. Yoshi Yoshi Shite Hoshii no
  3. Beat no Wakusei
  4. Joshi Kashimashi Monogatari (Morning Musume '21 Ver.)【Additional Track】
  5. Teenage Solution (Instrumental)
  6. Yoshi Yoshi Shite Hoshii no (Instrumental)
  7. Beat no Wakusei (Instrumental)
  8. Joshi Kashimashi Monogatari (Morning Musume '21 Ver.) (Instrumental)【Additional Track】

Limited Edition A Blu-ray[]

  1. Teenage Solution (Music Video)
  2. Teenage Solution (Dance Shot Ver.)
  3. Teenage Solution (Making Eizou) (メイキング映像; Making Video)

Limited Edition B Blu-ray[]

  1. Yoshi Yoshi Shite Hoshii no (Music Video)
  2. Yoshi Yoshi Shite Hoshii no (Dance Shot Ver.)
  3. Yoshi Yoshi Shite Hoshii no (Making Video)

Limited Edition C Blu-ray[]

  1. Beat no Wakusei (Close-Up Ver.)
  2. Teenage Solution (feat. Sato Masaki Ver.)
  3. Yoshi Yoshi Shite Hoshii no (feat. Sato Masaki Ver.)

Single V "Beat no Wakusei"[]

  1. Beat no Wakusei (Music Video)
  2. Beat no Wakusei (Dance Shot Ver.)
  3. Beat no Wakusei (Dance Shot Ver. Ⅱ)
  4. Beat no Wakusei (Making Eizou)

Featured Members[]

Morning Musume '21 promoting "Teenage Solution"

Morning Musume '21 promoting "Yoshi Yoshi Shite Hoshii no"

Morning Musume '21 promoting "Beat no Wakusei"

Single Information[]

Teenage Solution
Yoshi Yoshi Shite Hoshii no
  • Lyrics and Composition: Tsunku
  • Arrangement: Okubo Kaoru
  • Music Video: Morimoto Takahiro
Beat no Wakusei
  • Lyrics: Kodama Ameko
  • Composition: Erik Lidbom, miwaflower
  • Arrangement: Erik Lidbom
  • Music Video: ZUMI
Joshi Kashimashi Monogatari (Morning Musume '21 Ver.)


TV Performances[]

  • [2021.11.20] MelodiX! (Teenage Solution)[7]
  • [2021.11.24] Music Blood (Teenage Solution)[8]
  • [2021.12.31] CDTV Live! Live! - 2021.12.31 - New Year's Eve Special 2021→2022 (Yoshi Yoshi Shite Hoshii no)[9]

Concert Performances[]

Teenage Solution
Yoshi Yoshi Shite Hoshii no
Beat no Wakusei
Joshi Kashimashi Monogatari (Morning Musume '21 Ver.)
See also: Joshi Kashimashi Monogatari#Concert Performances

Chart Positions[]

Oricon Chart Positions[]

Daily & Weekly Rankings
Mon Tue Wed Thu Fri Sat Sun Week Rank Sales
- 2
5 3
2 120,435
6 18 14 12 9 11 10 12 4,515
10 16 20 17 13 11 13 18 4,278
11 19 19 17 16 - 28 20 1,394
- 19 19 17 16 - 28 43 468
Monthly Ranking
Year Month Month Rank Sales Ref
2021 December 4 129,288 [10]

Total Reported Sales: 129,696*

Yearly Ranking
Year Year Rank Sales
2021 55 120,435

Weekly Combined Ranking
Week Rank Points
2 126,780

Total Reported Points: x*

Billboard Japan Top Single Sales[]

Week Rank Sales Ref
2 151,068 [11]
14 5,065 [12]

Total Reported Sales: 156,133*

Recochoku Music Video Rankings[]

Song Daily Rank Weekly Rank Monthly Rank
Teenage Solution 1 1 N/A
Yoshi Yoshi Shite Hoshii no 4 3 N/A

Other Chart Rankings[]

Country Chart Highest
Flag of Japan.svg.png Japan Billboard Japan Single Sales (First Three Days) 2
"Teenage Solution" only
Billboard Japan Hot 100 3 [14]


  • The single was announced on September 24, 2021 with the announcement of Sato Masaki's graduation.[2] The release date was announced by the 10th generation members Ishida Ayumi and Sato on September 29, 2021 in Ishida's official Instagram account.[1]
  • This is the second single in a row to feature the same member lineup as the prior single.
  • On the cover of the Regular B version, the members are a grouped by their generation, with the two solo generations grouped together.
  • All of the spoken lines in "Teenage Solution" are spoken by 15th generation members.
  • In the promotional picture, jacket covers (Regular and Limited Editions C), and in her first profile picture in Hello! Project's website promoting the song "Beat no Wakusei", Yamazaki Mei's dress color is shown as yellow.[15] When Sato Masaki graduated, her dress color was changed from yellow to red to balance out the amount of each color. Yamazaki also addressed in a blog post that she was surprised that her dress color was changed. She shared that when the group were fitting the costumes for "Beat no Wakusei"'s photo shooting there were two different dress colors and thought that both colors would look good on her, so she wore both of them.[16]
  • The promotion edit for "Teenage Solution" was uploaded on YouTube just one day after the track names of the single were announced.
  • A short version of the "Beat no Wakusei" music video was anticipatedly posted on the group's official TikTok account on December 2, 2021.[17]
  • The Morning Musume '21 version of "Joshi Kashimashi Monogatari" was released digitally on December 14, 2021[18] separately from the single as the edition made available in the digital platforms with the single's release was the Regular Edition A.[19]
  • This is the first Single V of the group since "One・Two・Three" released in July 2012, and first of the Hello! Project overall since Berryz Koubou's "WANT!" Single V released in December 2012. It is also the first Single V to be released in Blu-ray format.
  • It was certified Gold by the RIAJ in December 2021 for the shipment of 100,000 copies.[20]
  • "Teenage Solution" will be used as the opening theme for BEATNIKS on Iwate Menkoi TV starting January 10, 2022.[21]

Additional Videos[]


  1. 1.0 1.1 https://www.instagram.com/p/CUZ21lVFQvi/
  2. 2.0 2.1 "モーニング娘。'21 佐藤優樹の卒業に関するお知らせ" (in Japanese). Hello! Project. 2021-09-24.
  3. "モーニング娘。'21 70thシングル『Teenage Solution/よしよししてほしいの/ビートの惑星』【初回生産限定盤SP2】発売延期のお知らせ" (in Japanese). Hello! Project. 2021-11-25.
  4. "モーニング娘。'21 70thシングル『Teenage Solution/よしよししてほしいの/ビートの惑星』【初回生産限定盤SP2】新発売日のお知らせ" (in Japanese). Hello! Project. 2021-12-08.
  5. "【UFW Web Store】モーニング娘。'21 シングルV「ビートの惑星」Blu-ray Disc 先行受注開始のお知らせ!" (in Japanese). Hello! Project. 2022-01-12.
  6. "12/27(月)受付スタート 1月通販 公開!" (in Japanese). UP-FC. 2021-12-24.
  7. https://www.tv-tokyo.co.jp/broad_tvtokyo/program/detail/202111/22545_202111222650.html
  8. "「モーニング娘。’21」ライヴでは「恋愛レボリューション21(updated)(2013年)」と「What is LOVE?(2014年)」のスペシャルダンスメドレーと新曲「Teenage Solution」を披露" (in Japanese). 2021-11-20
  9. https://twitter.com/tbscdtv/status/1476988776991772675
  10. "月間 シングルランキング"
  11. https://www.billboard-japan.com/charts/detail?a=sales&year=2021&month=12&day=20
  12. https://www.billboard-japan.com/charts/detail?a=sales&year=2021&month=12&day=20
  13. "【先ヨミ】SEVENTEEN『あいのちから』209,856枚で現在シングル1位" (in Japanese). Billboard JAPAN. 2021-12-09.
  14. https://www.billboard-japan.com/charts/detail?a=hot100&year=2021&month=12&day=20
  15. https://web.archive.org/web/20211127074439/http://www.helloproject.com/morningmusume/profile/mei_yamazaki/
  16. Yamazaki Mei. "No.883 イエローからレッド 山﨑愛生" (in Japanese). Morning Musume 15ki Official Blog. 2021-12-15.
  17. https://twitter.com/MorningMusumeMg/status/1465970528301162500
  18. "モーニング娘。'21「女子かしまし物語(モーニング娘。'21 Ver.)」12/14(火)配信スタート!". Hello! Project. 2021-12-14.
  19. "モーニング娘。'21「Teenage Solution/よしよししてほしいの/ビートの惑星」配信スタート!". Hello! Project. 2021-12-08.
  20. "ゴールドディスク認定" (in Japanese). RIAJ. 2021-10-09.
  21. "モーニング娘。'21「Teenage Solution」岩手めんこいテレビ「BEATNIKS」1月オープニングテーマに決定!" (in Japanese). Hello! Project. 2022-01-12.

External Links[]