After Melon Kinenbi disbanded in 2010, Otani started as a solo singer under the name Otani Masae aka Himawari, a name she chose after announcing a competition on her blog for a new stage name. Her last release under this name is the 2013 single BOY'S.
In addition to her activities as a solo artist, she was also a member of the Korean pop cover group 4C Crew under the name MELODY from 2016 to 2017. She also worked as an instructor, in both vocals and dance, for the idol-themed café AKIHABARA Backstage pass.
In May of 2010, Melon Kinenbi disbanded and she decided to leave UP-FRONT AGENCY. Having the goal of eventually performing her own music. She has yet to sign to a new agency. In December, the former idol will be performing at the IVY HALL in Shibuya for a special event called “X’mas CHAPEL LIVE & SWEETS PARTY.” Currently she plans to begin her transition to a theater actress and will be in some productions next spring.
Otani also recently teamed up with another Melon Kinenbi member, Shibata Ayumi, to make the mail order only photo book, “YOU&I.” The book contains original songs made by Shibata herself, and even came packaged with a CD recording of “YOU&I.” The book is available through Shibata's official fan club site which also offers posters, clear files, and a cell phone strap.
In 2011, Otani has so far released two digital singles for cellphone only download via the site mero.jp and will release both of those songs on CD. Her debut song “Killing My Caddy” was put out in extremely limited distribution in August, but will be coming out officially on January 12th. It will be followed up with her second release, “ENDLESS LOVE”, on February 9th. A music video was also released for her second single.
Shortly after, in April, the announcement of her third single was made. It is called "Bangin'" and was marketed as mug-rock, which is a genre apparently made up by Otani herself.
After the release of her third single, she started making her own music, releasing indies singles (sold only at her live events).
In 2014, she opened her own web shop, selling t-shirts, clear files, CDs and DVDs. Her first DVD Otani Masae Birthday Live Birthday + Payday = Everyone Togather could be bought from the site for 3,000 yen.
She also stopped using the stage name Otani Masae aka Himawari. Her releases afterwards credit her as Otani Masae.
In 2015, her online shop closed, but later re-opened.
In April, she released her first mini-album 33.
As part of a Japan/Korea music exchange, Otani announced that she would be the newest member of Korean artist group named 4C CREW under the name MELODY. To be involved with a K-pop group is something that she has always wanted to do. Their first live, 4C CREW SHOWCASE, would be held at the Shin-Okubo R & B bar on February 27.
On February 24 at 8:00 PM, Otani held a talk show at Official Hello! Project Shop in Akihabara in commemoration of joining 4C CREW. A janken tournament for goods was also held and a 4C CREW mini album, poster and T-shirt were sold.
Her last mention as member of 4C CREW on their Twitter was in May. Shortly after, the absence of MELODY and SANA was addressed. 4C CREW would continue on as "JS & KyonA from 4C CREW" until their last Twitter post in June 2017 before entering an indefinite hiatus.
In 2016, Murata Megumi and Otani announced at the beginning of the year that they were going to hold a live event in the fall. They sang six songs; two cover songs in English, as well as covering Taiyou to Ciscomoon, MAX, and their Melon Kinenbi songs "Eros" and "Denwa Matteimasu". They held several live events as the duo Muratani Shimai, and announced the release of their first single in March 2017. Their group name is a combination of kanji in their last names.
In 2017, Muratani Shimai released the CD Single "Reborn". It was sold exclusively at their Muratani☆Todoro no Enshuai live event at Shinjuku Loft with no plans of a general distribution. Merchandise from the event was however later made available for purchase on an online store in April.
In November, Otani, together with Matsuda Ichidai (松多壱岱) and Zushi Mitsuhiro (図師光博), formed a unit called 舞台MODS#1 (Stage MODS # 1) to create a place where actors can play seriously. The two-hour performance that combines a short and medium-sized conte group with an up-and-coming writer who has both popularity and ability and a team-based improvisation battle, shows the audience's awesomeness and distress to the audience. Tied up to the unit's play “Farewell Seishun's Light”, Otani released a the theme song as a solo single called Flash in late November.
Otani wrote a post on her official instagram in November 2019, where she said she had a panic attack (anxiety disorder), rested for a few months, and returned to the production of MODS#1.
In 2018, Otani stopped updating her blog, focusing on her twitter account.
In October, she was fired from the nail salon she was working in. Otani answered back on her official twitter, saying the was'nt fired, but that she had to quit due to sudden deafness because of accumulated stress.
In 2019, Otani started using BIGO LIVE, a leading mobile LIVE streaming community to show your talents and meet interesting people. It is also called a begging venue.
In May, she wrote on BIGO that she couldn't afford to pay her rent, causing her to lose sleep.
On September 2, Otani announced she'd be holding a 9th anniversary concert called Otani Masae 9th Anniversary Live -Uta no Chikara- (大谷雅恵9th Anniversaryライブ〜うたのちから〜).
- Name: Otani Masae (大谷雅恵)
- Nicknames: Masao, Maashii, Marcy
- Former Stage Name: Otani Masae aka Himawari
- Birthday: February 25, 1982
- Birthplace: Miyazaki, Miyazaki Prefecture, Japan (raised in Muroran, Hokkaido)
- Blood type: O
- Height: 160cm
- Western Zodiac: Pisces
- Eastern Zodiac: Dog
- Hobbies: Enjoying music
- Favorite colors: Garish colors
- Favorite flowers: Cockscomb
- Favorite season: Summer
- Favorite saying: "Dream + effort = reality"
- Favorite food: Raw food, Tuna
- Disliked food: Sweet and sour food
- Favorite songs: Kiseki no Hana, Endless Youth, Judas
- Looks up to: Beyonce Knowles, Lady Gaga
- Hello! Project groups:
- Shuffle units:
- [2011.01.12] KILLING MY CADDY Otani Masae A.K.A. Himawari
- [2011.02.09] ENDLESS LOVE Otani Masae A.K.A. Himawari
- [2011.04.06] BANGIN' Otani Masae A.K.A. Himawari
- [2011.12.03] Merry Christmas Special Mix CD
- [2012.04.28] JUMP!!!!! Otani Masae A.K.A. Himawari
- [2012.06.30] MUSIC Otani Masae A.K.A. Himawari
- [2013.02.25] BOY'S Otani Masae A.K.A. Himawari
- [2014.02.25] CALL ME POP
- [2017.11.22] Flash
- [2018.07.18] Gale
- [2014.10.10] my love (with Natural Born)
- [2007.12.12] 6gatsu no Sunshine
- [2002.12.04] Hello! Project Douyou Eizou Shuu ~Ponkikies21~
- [2003.05.01] Atarashii Douyou
- [2014.02.25] Otani Masae Birthday Live Birthday + Payday = Everyone Togather
Discography Featured In
- Melon Kinenbi
- Melon Kinenbi
- Folk Songs 2
- The Douyou Pops 4 Aki no Uta Shuu
- Shinsaku Douyou Pops 1
- FS4 FOLK SONGS 4
- Petit Best 2 ~3・7・10~
- Petit Best 3
- Petit Best 4
- Petit Best 5
- Petit Best 6
- Petit Best 7
- Petit Best 8
- Petit Best 9
- Hello! Project no Zenkyoku kara Atsumechaimashita! Vol. 1
- Hello! Project no Zenkyoku kara Atsumechaimashita! Vol. 2
- Hello! Project no Zenkyoku kara Atsumechaimashita! Vol. 3
- 10nin Matsuri
- Sexy 8
- H.P. ALL STARS
- Melon Kinenbi
- Amai Anata no Aji
- Kokuhaku Kinenbi
- Denwa Matteimasu
- This is Unmei
- Saa! Koibito ni Narou
- Natsu no Yoru wa Danger!
- Akai Freesia
- Chance of LOVE
- MI DA RA Matenrou
- Kawaii Kare
- Namida no Taiyou
- Champagne no Koi
- Nikutai wa Shoujiki na EROS
- Onegai Miwaku no Target ~Mango-pudding Mix~
- Charisma, Kirei
- Onegai Miwaku no Target (indie)
- DON'T SAY GOOD-BYE (indie)
- Pinchi wa Chance - Baka ni Narou ze! (indie)
- sweet suicide summer story (indie)
- Seishun-on-the-Road (indie)
- Melon Tea (indie)
- 10nin Matsuri
- Sexy 8
- Hello! Project Seikatai
- H.P. ALL STARS
- The Possible
- Muratani Shimai
- Melon Kinenbi
- Melon Kinenbi Live Tour 2003 Haru ~1st Anniversary~
- Melon Kinenbi ~03' Christmas Special Chou Shibu Melon~
- Melon Kinenbi Live Tour 2004 Natsu ~Gokujou Melon~
- Natsumi Abe '05 Revue & Concert "How Are You, Miss Murata?" in Nippon Seinen-kan
- Melon Kinenbi Nippon Seinenkan Kouen '2005 Revue & Concert "Murata-sa~n, Gokii?"
- Melon Kinenbi Concert Tour 2005 Fuyu "Kyou mo Melon Ashita mo Melon, Christmas wa Musk Melon de!"
- Melon Kinenbi Live House Tour 2006 ~Shakunetsu Tengoku IN YOKOHAMA BLITZ~
- Melon Kinenbi Concert Tour 2006 Fuyu "FRUITY KILLER TUNE"
- Hello☆Pro On Stage! 2007 ｢Rock desu yo!｣
- Melon Kinenbi Live House Tour 2007 ~LOCK ON!~
- Melon Kinenbi Concert Tour 2007 Fuyu "100% Melon Juice"
- Melon Kinenbi Live House Tour 2008 Yojigen Jack!!
- Melon Kinenbi Live Tour 2009 "Gaisen"
- Melon Kinenbi FINAL STAGE "MELON'S NOT DEAD"
- Event V 2 Shot de Koibito Kibun!
- Shin Cyborg Shibata!!
- Tatakae!! Cyborg Shibata San
- Melon Kinenbi Monogatari ~Decade of MELON KINEN-BI~
- 10nin Matsuri
- Sexy 8
- [2019.09.08] Otani Masae 9th Anniversary Live -Uta no Chikara- (大谷雅恵9th Anniversaryライブ〜うたのちから〜)
- [2019.12.11] Fun!Fun!Fun! (joint with AiLi, Kana Houjou, Vitamin Kiss, Kisekirei, Sakurada Manami, Nanaumi Nana)
- [2019.12.19] Raibaa X'mas LIVE (ライバー X'mas LIVE) 
- [2001.07.31-2001.10.02] Cyborg Shibata
-  Musical Sougen no Hito (ミュージカル 草原の人; Musical Prairie Girl)
-  Edo Kara Chakushin!? ~Timeslip to Kengai!~
-  Sukoshi Hanarete, Soko ni Ite (すこし離れて、そこに居て)
- [2010.03.07-22] Melon Kinenbi Monogatari ~DECADE OF MELON KINEN-BI~
- [2010.09.01-05] Kizame, Waga Hada ni Kimi no Ibuki wo
-  Sukeban Deka Codename Asamiya Saki (スケバン刑事 コードネーム＝麻宮サキ)
- She said in a 2004 interview that the person she respects the most is Beyoncé. In her blog, she says that she respects Lady Gaga.
- She was one of the MCs for the Hello! Project Shinjin Kouen June 2009 ~Nakano STEP!~.
- After leaving UP-FRONT AGENCY in 2010 she started to work part time at a café while working toward her new goals.
- She is known for frequently changing her hair color as seen throughout the various singles, albums and performances of Melon Kinenbi.
- Only one of her singles, "ENDLESS LOVE", has a music video.
- She often dyes her own hair.
- Her motto is "Dream+Effort=Reality"
- Her favorite food is tuna.
- Her favorite place is New York.
- She wants to get married.
- Her favorite song is "Judas" by Lady Gaga.
- Her favorite artists are P!nk and Lady Gaga.
- She appeared as a special guest at Shimizu Saki's 22nd birthday event to give a surprise birthday message to Saki.
- On her official Instagram she says her dream is to sing in Korea (written in Korean and Japanese).
- ↑ Official Gekijyo Page
- ↑ https://web.archive.org/web/20150307164936/http://otanimasae.shop-pro.jp/?pid=71893789
- ↑ https://ameblo.jp/masae-otani/entry-12123286939.html
- ↑ https://twitter.com/OTANI_MASAE/status/701013804356775936
- ↑ https://twitter.com/odo_pop/status/734340027321221120
- ↑ https://twitter.com/Official_4CCREW/status/735727142437195776
- ↑ 活動休止を決める程、精神面で大きなダメージを受ける出来事があり、うつ病とパニック障害が始まりました。 通院を続けて落ち着くまで待ち、ギリギリまで悩み制作さんをお待たせし、数ヶ月だけ休んでこの舞台で復帰させて頂きました。 このお話しを頂いてなかったら今頃私はどこで何していたでしょうか。 一旦通院を辞めたものの、やはり1人では良くない方向に行ってしまうので再びお世話になりながら今もまだ不安障害と共に生きています。 本当はもっと強い自分がどこかに隠れています。 出てこい出てこーい。 #舞台 #mods #オムニバス #うつ病 #パニック障害 #不安障害 #電車 #人混み #閉所 #でも生きれる #夢があるから #治してみせます
- ↑ Twitter (2ch)
- ↑ Official twitter
- ↑ BIGO LIVE
- ↑ Otani Masae Official Twitter
- ↑ Tiget Official Site
- ↑ Ofifcial Twitter (December 9, 2019)
- ↑ Twitter
- ↑ https://www.instagram.com/masababy225/