Tamenaga Shion (為永幸音) is a Japanese pop singer under Hello! Project as a 9th generation member of ANGERME. She is a former member of Hello Pro Kenshuusei. Prior to joining Hello! Project, she was active as a Nagano local idol.
Tamenaga Shion was born on February 9, 2004 in Nagano, Japan.
In September 2015, Tamenaga made her acting debut in the Suguru Hi no Yamaneko film, portraying the childhood version of Tokiko.
On December 24, 2015 she joined the duo idol group ☆ARION☆, and stayed in the group until its disbandment on December 31, 2016. While in ☆ARION☆, she also began pursuing solo activities under the name OTO♡.
In 2016, Tamenaga participated in Morning Musume '16 Shinseiki Audition, but failed to pass the third round.
On October 31, she ceased activities as OTO♡.
Over the summer, Tamenaga participated in the Hello! Project Shin Member Audition for a chance to join Hello! Project in commemoration of its 20th anniversary, and made it to the finals alongside seven others before it was ultimately decided that no one would pass the audition.
Following the audition, Tamenaga accepted an invitation to join Hello Pro Kenshuusei. She was introduced alongside six other finalists at the Hello! Project Kenshuusei Happyoukai 2017 12gatsu ~Conti→New!~ show on December 10.
On April 4, she participated in a fanclub event titled Hello Pro Kenshuusei Special Event in Nagoya ~Hajimemashite! 3~ at Midland Square Cinema 2 alongside Yonemura Kirara, Hashisako Rin and Shutto Anna.
Tamenaga participated in the opening act and challenge act for the Morning Musume '19 Concert Tour Haru ~BEST WISHES!~.
On July 26, Tamenaga won the judge's dance award at the Hello! Project Kenshuusei Happyoukai 2020 ~Natsu no Koukai Jitsuryoku Shindan Test~ event for her performance of "Daite yo! PLEASE GO ON".
On November 2, it was announced on ANGERME's YouTube Channel that Tamenaga had joined ANGERME as a 9th generation member, alongside Matsumoto Wakana and Kawana Rin. She and the rest of the 9th generation started performing with the group on December 9, at the ANGERME Concert 2020 ~Kishotenketsu~ Funaki Musubu Sotsugyou Special concert. 
When Tamenaga joined ANGERME, she was in the second year of high school. As of April 2021, she is currently attending her last year of high school.
Here is a list of nicknames that was used to refer to Tamenaga Shion:
- Tame-chan (ためちゃん): Used prior to joining Hello Pro Kenshuusei and used by ANGERME members.
- Tame (ため): One of her nicknames as a Hello Pro Kenshuusei member.
- Shionnu (しおんぬ): One of her nicknames as a Hello Pro Kenshuusei member.
- Shion-chan (しおんちゃん): One of her nicknames as a Hello Pro Kenshuusei member.
- Name: Tamenaga Shion (為永幸音)
- Former Stage Name: OTO♡
- Nicknames: Tamechan (ためちゃん), Shion-chan (しおんちゃん), Shionnu (しおんぬ), Tame (ため)
- Birthdate: February 9, 2004
- Birthplace: Nagano, Japan
- Blood Type: O
- Height: 153 cm (5 ft 0.2 in)?
- Western Zodiac: Aquarius
- Eastern Zodiac: Monkey
- Hello! Project Status:
- UP-FRONT PROMOTION Status:
- 2017-12-04: Member
- ANGERME Member Color:
- Hello! Project Groups:
- Other Groups:
- Beem Idol School (2015)
- ☆ARION☆ (2015-2016)
-  Shoujotachi no Ketsudan ~Mitchaku!! Hello! Project 20 Shuunen Audition~ (AbemaTV)
- [2017-] Hello! Project Station
-  Hello Pro no Oshigoto Challenge! 2
-  Suguru Hi no Yamaneko
- She knows some tate (殺陣; a type of sword-based stage combat).
- She and her grandfather are learning how to play the drums, and they practice on their home drum-set.
- She gives her grandfather drum lessons, and he jokes that his teacher (Shion) is scary.
- She was an extra in Little Glee Monster's "Jinsei wa Ichidokiri" music video, as the girl wearing a blue shirt and red backpack.
- She can't make up her mind on what to eat from the menu at a restaurant.
- She loves cooking her own healthy meals like konnyaku and cream omurice.
- She is the first of the Hello Pro Kenshuusei 28th generation to debut in Hello! Project.
- She loves black tea, and often buys black tea flavored sweets whenever she sees them.
- Her favorite types of sweets are tea-based.
- She wants to contribute to ANGERME and become a leader of the group.
- She wants to be in charge of the dance club.
- Gallery:Tamenaga Shion
- Gallery:ANGERME 9th Generation
- List:Tamenaga Shion Discography Featured In
- List:Tamenaga Shion Concert & Event Appearances
- List:Tamenaga Shion Publications Featured In
- List:Tamenaga Shion Pocket Morning Weekly Q&A
- "【ハロ！ステ#284】ひなフェス2019！BEYOOOOONDS＆カントリー・ガールズLIVE、ハロプロ研修生紹介Movie、こぶしファクトリー最新MV公開！ MC：浅倉樹々＆前田こころ" (in Japanese). Hello! Project Station (via YouTube). 2019-4-10.
- "はじめまして☆彡" (in Japanese). Beem Idol School Official Blog. 2015-05-02.
- "みなさまへご報告" (in Japanese). Beem Idol School Official Blog. 2015-11-21.
- "感謝の気持ちを込めて…" (in Japanese). OTO Official Blog. 2017-10-31.
- Shoujotachi no Ketsudan ~Micchaku!! Hello! Project 20 Shuunen Audition~ Episode #1. AbemaTV. 2017-11-13.
- Shoujotachi no Ketsudan ~Micchaku!! Hello! Project 20 Shuunen Audition~ Episode #6. AbemaTV. 2017-12-04.
- "ハロプロ研修生に新メンバーが加入！" (in Japanese). Hello! Project. 2017-12-11.
- "アンジュルム 新メンバー決定！" (in Japanese). Hello! Project. 2020-11-02.
- "13回目の「ママありがとうの日」" (in Japanese). OTO Official Blog. 2017-02-09.
- BLT magazine January 2021 issue.
- Hello Dream. Episode 7.
|Hello Pro Kenshuusei|