Glass Heart (TV series)

Glass Heart
Promotional poster
グラスハート (Gurasu Haato)
GenreMusical drama
Created byNetflix
Based onGlass Heart series
by Mio Wakagi
Written byMari Okada
Tomoko Akutsu
Shiho Kosaka
Anna Kawahara
Directed byKensaku Kakimoto
Kotaro Goto
StarringTakeru Satoh
Yu Miyazaki
Keita Machida
Jun Shison
Masaki Suda
ComposerMasakatsu Takagi
Country of originJapan
Original languageJapanese
No. of seasons1
No. of episodes10
Production
Running time33–54 minutes
Production companyRobot Communications
Original release
NetworkNetflix
ReleaseJuly 31, 2025 (2025-07-31)

Glass Heart (Japanese: グラスハート, Hepburn: Gurasu Haato) is a Japanese musical drama series starring Takeru Satoh, Yu Miyazaki, Keita Machida, Jun Shison, and Masaki Suda. It is based on the novel series of the same name by author Mio Wakagi with illustrations by Mitsuru Hashimoto, Chika Umino, and Takami Fujita, published from 1993 to 2011. The series premiered on Netflix on July 31, 2025 for 10 episodes.[1][2]

Synopsis

A prospective drummer abruptly loses her position in the group; her life, however, takes a passionate turn when she is recruited by a talented musician for his new band, TENBLANK.[3][4]

Cast

Main

Supporting

Production

In 2024, lead actor Takeru Satoh, who is listed as a co-executive producer, commented on his intent to produce the project saying:[1]

The advent of Netflix and the global popularity of Korean dramas led me to aspire for Japanese live-action productions to achieve similar worldwide adoration, which then became my definite goal. The live-action adaptation of Glass Heart represents the initial stride in realizing that ambition.

Casting

Lead actress Yu Miyazaki was cast after a series of auditions attended by Satoh. She learned how to play the drums for two years and did not have a body double during filming.[9] For the rest of the cast, they learned learned how to play instruments as well as singing for over a year and debuted as an actual band.[10]

Music

Glass Heart's original score was composed by Masakatsu Takagi.[10] Radwimps frontman Yojiro Noda and music producer Yaffle provided original songs for the series with the former writing the lyrics for the song "Senritsu to Kesshou" or "Crystalline Echo".[11] Musicians Taka of One Ok Rock, Yohei Kawakami of Alexandros, Ryujin Kiyoshi, TeddyLoid, and Tanaka also contributed, as well as vocalists Zarame and Ao.[10]

The series features original songs performed by the fictional band TENBLANK. An album by the band was released on digital on July 31, 2025, and a two-disc physical album was released a day later.[12][13]

Reception

On the review aggregator Rotten Tomatoes, 80% of five critics gave the film a positive review.[14] Common Sense Media's Weiting Liu wrote: "Glass Heart is glossy and kinetic, with earnest actors embodying equally earnest characters. You can sense the cast's genuine belief in the script".[15] The critic James Hanfeld of The Japan Times gave a score of two out of five and described the series as a "flashy rock fairytale scrubbed of grit" but praised the performances of the cast.[16]

The series ranked eight in Netflix's Global Rankings (Non-English) for the week of August 4 to 10, 2025.[17] In the second week of August 2025, TENBLANK's "Crystalline Echo" ranked first in Spotify Japan's "Viral 50".[18]

References

  1. ^ a b "佐藤健、主演・製作の青春音楽ドラマ『グラスハート』に菅田将暉・宮崎優・町田啓太・志尊淳ら集結【コメントあり】". Oricon. Archived from the original on February 28, 2024. Retrieved February 28, 2024.
  2. ^ Japan, The Hollywood Reporter (2025-07-31). "佐藤健、主演のNetflixシリーズ『グラスハート』のヒットに向け気勢「一緒に時代を動かそう」". THR Japan (in Japanese). Retrieved 2025-07-31.
  3. ^ "Netflixシリーズ「グラスハート」劇中バンド・TENBLANKが現実世界でデビュー｜佐藤健、宮﨑優、町田啓太、志尊淳が語る誕生秘話 - 音楽ナタリー 特集・インタビュー". 音楽ナタリー (in Japanese). Retrieved 2025-07-31.
  4. ^ Ramachandran, Naman (2025-05-21). "Netflix Readies Star-Studded Japanese Musical Drama 'Glass Heart' With Takeru Satoh". Variety. Retrieved 2025-07-31.
  5. ^ SYO (2025-07-29). "佐藤健×宮﨑優×町田啓太×志尊淳は、劇中バンド「TENBLANK」のリアリティをどう作り上げたのか？──Netflixシリーズ「グラスハート」は7月31日から世界独占配信". GQ JAPAN (in Japanese). Archived from the original on 2025-07-29. Retrieved 2025-07-31.
  6. ^ "「グラスハート」宮崎優ヒロイン抜擢の理由（シネマトゥデイ）". Yahoo!ニュース (in Japanese). Retrieved 2025-07-31.
  7. ^ "【レポート】Netflixシリーズ『グラスハート』イベントに佐藤健、宮﨑優、町田啓太、志尊淳がサプライズ登場＆生演奏". THE FIRST TIMES (in Japanese). Retrieved 2025-07-31.
  8. ^ "佐藤健主演ドラマ「グラスハート」、劇中バンドのデビューアルバム「Glass Heart」が配信開始（WEBザテレビジョン）". Yahoo!ニュース (in Japanese). Retrieved 2025-07-31.
  9. ^ "Netflix『グラスハート』佐藤健が見出した新ヒロイン・宮崎優に大ブレイクの予感". ORICON NEWS. Retrieved 2025-08-17.
  10. ^ a b c "Feel the Beat: 'Glass Heart' Main Trailer and Title Song Revealed". About Netflix. Retrieved 2025-08-17.
  11. ^ Go, Mayks (2025-05-23). "RADWIMPS' Yojiro Noda To Provide Songs For Netflix Drama 'Glass Heart'". Archived from the original on 2025-07-24. Retrieved 2025-08-17.
  12. ^ "佐藤健主演『グラスハート』劇中バンドのデビューアルバムトラックリスト公開". ORICON NEWS. 2025-07-02. Retrieved 2025-08-17.
  13. ^ "Netflixシリーズ「グラスハート」劇中バンド、TENBLANKデビューアルバム『Glass Heart』リリース記念！「タワラブ！」キャンペーン開催決定！ - TOWER RECORDS ONLINE". Archived from the original on 2025-07-15. Retrieved 2025-08-17.
  14. ^ "Glass Heart: Season 1 | Rotten Tomatoes". www.rottentomatoes.com. Retrieved 2025-08-17.
  15. ^ "Glass Heart TV Review | Common Sense Media". www.commonsensemedia.org. Retrieved 2025-08-18.
  16. ^ Hadfield, James (2025-08-07). "'Glass Heart': A flashy rock fairytale scrubbed of grit". The Japan Times. Retrieved 2025-08-17.
  17. ^ "【Netflix 世界ランキング】日本ドラマ『グラスハート』海外で高評価「直感的に心に響く」「音楽への情熱的なラブレター」とメディアも絶賛：TV番組 ネットフリックスおすすめ | BANGER!!!（バンガー） 映画愛、爆発!!!". BANGER!!!（バンガー）　映画愛、爆発!!! (in Japanese). Retrieved 2025-08-17.
  18. ^ "佐藤健主演『グラスハート』劇中歌がバイラル首位獲得 TENBLANKが集める作品世界を超えた共感". Real Sound｜リアルサウンド (in Japanese). 2025-08-12. Archived from the original on 2025-08-16. Retrieved 2025-08-17.
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