Issei Mamehara

In this Japanese name, the surname is Mamehara.
The native form of this personal name is Mamehara Issei. This article uses Western name order when mentioning individuals.
Issei Mamehara
豆原 一成
Mamehara in 2023
Born (2002-05-30) May 30, 2002
Maniwa, Okayama, Japan
Other namesMáme[1]
Occupations
  • Singer
  • actor
Musical career
Genres
InstrumentVocals
Years active2019–present
LabelsLapone
Member ofJO1
WebsiteOfficial website
Japanese name
Kanji豆原 一成
Hiraganaまめはら いっせい
RomanizationMamehara Issei
Korean name
Hangul마메하라 잇세이
Revised RomanizationMamehara Itsei
McCune–ReischauerMamehara Issei

Issei Mamehara (豆原 一成, Mamehara Issei; born May 30, 2002), is a Japanese singer and actor. He debuted as a member of the Japanese boy band JO1 in 2020, after placing first in the first season of Produce 101 Japan. He made his debut as an actor in 2021 and played Kamen Rider Chimera in the Kamen Rider Revice films.

Early life and education

Issei Mamehara was born on May 30, 2002, in Maniwa, Okayama, Japan.[2][3] During his early years, he developed a passion for physical activities, participating in baseball, swimming, and sumo tournaments throughout his school life.[3] Mamehara's interest in dance emerged during elementary school, inspired by his older sister's dance classes.[4][5] This interest deepened when he became a fan of the boy band Generations from Exile Tribe after watching one of their televised performances, prompting him to enroll in a dance school in his second year of junior high.[5][6] He specialized in 1990s hip hop dance[6] and began teaching children at the same dance school by his freshman year of high school.[4][7] Mamehara also grew up with a deep appreciation for tokusatsu media, particularly the Kamen Rider franchise, and aspired to appear in the series as an actor.[4]

Mamehara graduated from high school in March 2021.[8]

Career

2019–2020: Produce 101 Japan and debut with JO1

After failing a series of auditions in 2019, Mamehara's older sister, a fan of South Korean Produce 101, suggested he try out for Produce 101 Japan. Having limited knowledge about K-pop, he initially refused to apply because he wanted to be a professional dancer instead.[4][5] He eventually applied a day before the deadline, following his sister's encouragement.[5] The show was held from September to December, where he finished first with 261,583 votes.[9][10][11]

Following an "intense" boot camp in South Korea,[7] seventeen-year-old Mamehara debuted as a member of the resulting boy group JO1 on March 4, 2020, with the release of their first single Protostar under Lapone Entertainment. His win awarded him the choreographic center position in the group's debut song, "Infinity".[4][9][12]

2020–present: Acting debut

In November 2020, Mamehara was named Mezamashi TV's monthly entertainment presenter, making him the segment's youngest presenter at that time.[13] He then took acting classes and made his acting debut in the Yoshimoto Kogyo-produced anthology film, Meters Away, Worlds Apart in 2021,[4][14] alongside Produce 101 Japan's host and comedian Takashi Okamura.[8][14] In 2022, Mamehara was cast as Kamen Rider Chimera in the film Kamen Rider Revice: Battle Familia.[15][16] He reprised his role in Birth of Chimera (2022), an exclusive Toei Tokusatsu Fan Club spin-off film that delves into his character's backstory.[17]

In 2023, he made his small screen debut in NHK's War Records of Superhuman Fortress Hiroshi, as the humanoid Hiroshi.[18][19] In the following year, he made his TBS Sunday Theatre debut in the Ryunosuke Kamiki-led drama The Diamond Sleeping in the Sea.[20] In February 2025, Mamehara was appointed as an ambassador to his hometown of Maniwa.[21] Later that year, he is set to play the lead role of Tsukasa Kiriki for the live action movie adaptation of the manga Bad Boys[22] and co-star opposite Yoshie Ichige in the family drama Mt. Fuji, Coffee, and the Formula for Happiness.[23] Issei will play Ichige's grandson, Takuma, a university student who likes coffee and discovers his dream with his grandmother.[23]

Discography

For Mamehara's discography with JO1, see JO1 discography.

Singles

List of singles as a lead artist, with selected chart positions, showing year released and album name
Title Year Peak chart position Sales Album
JPN
DL
[24]
"Not Puppy Love" 2025 47 Non-album single

Songwriting credits

All song credits are adapted from the Japanese Society for Rights of Authors, Composers and Publishers's database, unless otherwise noted.[26]

Key
# Indicates a non-commercial release
List of songs, showing year released, artist name, and name of the album
Title Year Artist(s) Album Lyrics Ref.
Credit With
"Breaking the Rules" 2023 Keigo, Takumi, Máme 2023 JO1 2nd Arena Live Tour "Beyond the Dark – Rise in Kyocera Dome" Keigo, T.K, Máme [26]
"Not Puppy Love" # 2025 Máme PlanJ tracks[a] Sean Bowe [27]
"Mama" (ママへ) # Makka [26][28]

Filmography

For Mamehara's works with JO1, see JO1 § Filmography.

Film

List of films, with the release year, role, and note
Year Title Role Note Ref.
2021 Meters Away, Worlds Apart Hiroki Asada Segment: "Today is A Good Day" [14]
2022 Kamen Rider Revice: Battle Familia Nozomu Otani / Kamen Rider Chimera [15]
2025 Bad Boys: The Movie Tsukasa Kiriki Lead role [22]
Mt. Fuji, Coffee, and the Formula for Happiness Takuma Andō Lead role [23]

Television

List of television programs, with the release year, role, and note
Year Title Role Note Ref.
2019 Produce 101 Japan Contestant Finished 1st [9]
2020 Mezamashi TV Host of the month [13]
2022 Short Program Hajime Toshino Lead role; anthology series [29]
Kamen Rider Revice Movie Spin-Off Web Drama: Birth of Chimera Nozomu Otani Lead role; television film [17]
2023 War Records of Superhuman Fortress Hiroshi Hiroshi Tanaka [18]
Azatoi Type A to Z Takuma Drama segment of Azatoku Nani ga Waruino? [30]
An Encouragement of Laughing Life Nobuyuki Yamamoto [31]
2024 Mame's and Sho's Best Holiday - JO1derful Tour Himself With Sho Yonashiro [32]
The Diamond Sleeping in the Sea Seiya [20]

Music videos

List of music videos, with release year, title, artist and note
Year Title Ref.
2025 "Not Puppy Love" [27]
"Mama" (ママへ) [28]

Footnotes

  1. ^ PlanJ is a series of self-projects by JO1 members on YouTube.[27]

References

  1. ^ Sirikul, Laura. "JO1 on their JAM packed tour". Timid Magazine. Archived from the original on April 23, 2025. Retrieved May 19, 2025.
  2. ^ "オーディションから誕生の「JO1」の凄さと詳細プロフィール紹介". News Post Seven (in Japanese). April 15, 2020. Archived from the original on March 7, 2023. Retrieved March 10, 2023.
  3. ^ a b "JO1・豆原一成さんに聞く 「世界を舞台に戦いたい」". Sanyo Shimbun Digital (in Japanese). March 7, 2020. Archived from the original on March 7, 2020. Retrieved March 10, 2023.
  4. ^ a b c d e f "ドラマ初主演&ドキュメンタリー映画公開で勢いに乗る 「JO1」最年少メンバー・豆原一成インタビュー". Talent Power Ranking. March 9, 2022. Archived from the original on November 12, 2022. Retrieved March 10, 2023.
  5. ^ a b c d Murakami, Natsuna (October 17, 2021). "JO1 豆原一成の"挑戦"し続ける人生 今、同世代に伝えたいこと". Real Sound (in Japanese). Archived from the original on June 30, 2022. Retrieved March 10, 2023.
  6. ^ a b "【白濱亜嵐×豆原一成】豆ちゃんの印象は？「子犬みたいで超可愛い♥」今をときめくイケメン2人の激エモ対談". Ar Magazine. December 11, 2021. Archived from the original on February 3, 2024. Retrieved February 3, 2024.
  7. ^ a b E. Morales, Iavana (May 24, 2023). "JO1 Open Up About "Tropical Night," Produce 101 Japan, and Their 3-Year Journey Since Debut". Teen Vogue. Archived from the original on May 24, 2023. Retrieved February 3, 2024.
  8. ^ a b "不器用な青年を好演！豆原一成(JO1)が映画初出演で見せたステージ上とのギャップ". Hominis (in Japanese). January 5, 2022. Archived from the original on December 6, 2022. Retrieved March 10, 2023.
  9. ^ a b c "『PRODUCE 101 JAPAN』JO1、デビューメンバー11人が決定 初代センターは最年少17歳の豆原一成". Oricon (in Japanese). December 11, 2019. Archived from the original on December 11, 2022. Retrieved March 10, 2023.
  10. ^ "「PRODUCE 101 JAPAN」デビューメンバー11人決定 1位は最年少・豆原一成＜1位～20位最終順位＞". Modelpress (in Japanese). December 11, 2019. Archived from the original on December 11, 2019. Retrieved March 10, 2023.
  11. ^ C Channel Co., Ltd. (September 12, 2019). 『PRODUCE 101 JAPAN』とのコラボステージ決定！9月21日(土)に101人の練習生が「SUPER C CHANNEL 2019」の会場に勢ぞろい！ [Collaboration stage with "PRODUCE 101 JAPAN" decided! 101 trainees will be at the "SUPER C CHANNEL 2019" venue on Saturday, September 21st!]. PR Times (in Japanese). Archived from the original on January 25, 2022. Retrieved October 6, 2023.
  12. ^ "【紅白リハ】JO1豆原一成、「僕たちの可能性を伝えられたら」 センター務める「無限大」披露で". Oricon (in Japanese). December 29, 2023. Archived from the original on August 31, 2023. Retrieved August 31, 2023.
  13. ^ a b "JO1豆原一成『めざましテレビ』マンスリーエンタメプレゼンター就任「フルパワーで頑張ります」". Oricon (in Japanese). October 28, 2020. Archived from the original on January 28, 2021. Retrieved March 10, 2023.
  14. ^ a b c "JO1豆原一成と般若出演、人気俳優×吉本タレント×クリエイターが集結したオムニバス映画公開決定". Natalie (in Japanese). December 10, 2020. Archived from the original on February 4, 2021. Retrieved March 10, 2023.
  15. ^ a b "JO1豆原一成の夢叶う！「劇場版 仮面ライダーリバイス」でハイジャック犯に立ち向かう". Natalie (in Japanese). June 13, 2022. Archived from the original on July 17, 2022. Retrieved March 13, 2023.
  16. ^ "仮面ライダーキマイラ". 仮面ライダー図鑑 (in Japanese). Archived from the original on February 3, 2024. Retrieved February 3, 2024.
  17. ^ a b "劇場版「リバイス」出演のJO1豆原一成がスピンオフ主演！橋本祥平はキマイラに変身". Natalie (in Japanese). June 21, 2022. Archived from the original on July 13, 2022. Retrieved March 13, 2023.
  18. ^ a b "高山一実、NHKドラマ初主演 JO1豆原一成&山之内すず共演の夜ドラ『超人間要塞ヒロシ戦記』来年2月放送". Oricon (in Japanese). November 28, 2022. Archived from the original on November 28, 2022. Retrieved March 13, 2023.
  19. ^ "JO1・豆原一成、自身が演じる役柄について語る「今まで演じた役の中で一番難しかった」＜超人間要塞ヒロシ戦記＞". The Television (in Japanese). February 13, 2023. Archived from the original on February 3, 2024. Retrieved February 3, 2024.
  20. ^ a b "神木隆之介主演「海に眠るダイヤモンド」に新キャスト8名、JO1豆原一成が日曜劇場デビュー". Natalie (in Japanese). September 15, 2024. Archived from the original on September 16, 2024. Retrieved October 17, 2024.
  21. ^ "JO1豆原一成、故郷・真庭大使就任 "20歳の集い"で語った夢かなう「心からうれしい」". Oricon (in Japanese). February 11, 2025. Archived from the original on March 13, 2025. Retrieved February 11, 2025.
  22. ^ a b "JO1豆原一成が特攻服姿に！あの不良マンガ「BADBOYS」実写映画化で初主演決定". Natalie (in Japanese). January 7, 2025. Archived from the original on January 21, 2025. Retrieved January 8, 2025.
  23. ^ a b c "JO1豆原一成が市毛良枝と映画ダブル主演、祖母との日々の中で夢を見つける大学生役". Natalie. May 28, 2025. Retrieved May 28, 2025.
  24. ^ Peaks on the Billboard Japan Download Songs chart:
  25. ^ "週間 デジタルシングル（単曲）ランキング 2025年06月30日付". Oricon (in Japanese). Archived from the original on June 25, 2025. Retrieved June 25, 2025.
  26. ^ a b c "Works Information Database" (in Japanese). JASRAC. Retrieved May 31, 2025. When searching, put "MAME" under 著作者名 (Author's name) and "LAPONEエンタテインメント" under 出版者名 (Publisher's name).
  27. ^ a b c "豆原一成（JO1）、オリジナルソング 「Not Puppy Love」に"大人になった自分の想い"込める". Billboard Japan (in Japanese). January 10, 2025. Archived from the original on April 8, 2025. Retrieved April 8, 2025.
  28. ^ a b "JO1・豆原一成、母の日に最高の贈り物「全国のお母さんにも、届いたらうれしいな」 オリジナルソング「ママへ」公開". Oricon (in Japanese). May 11, 2025. Archived from the original on May 11, 2025. Retrieved May 11, 2025.
  29. ^ "JO1主演「ショート・プログラム」ビジュアル&配役が解禁、過去コンテンツも続々配信". Natalie (in Japanese). February 14, 2022. Archived from the original on February 25, 2022. Retrieved March 2, 2022.
  30. ^ "JO1豆原一成が彼女持ちの大学生役に、川口ゆりな演じる幼馴染を優しく見守る". Natalie (in Japanese). April 10, 2023. Archived from the original on April 3, 2024. Retrieved April 3, 2024.
  31. ^ "小池栄子主演「ラフな生活のススメ」にJO1豆原一成、松本穂香が仲間入り 脚本はAマッソ加納ら". Natalie (in Japanese). May 29, 2023. Archived from the original on July 28, 2023. Retrieved July 11, 2023.
  32. ^ "『JO1』豆原一成&與那城奨が"最高の休日を満喫" 地上波初の冠番組、テレ東系「豆と奨の最高の休日 JO1 ダフルツアー」14日放送". Chunichi Shimbun (in Japanese). September 9, 2024. Archived from the original on September 9, 2024. Retrieved October 17, 2024.
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