Glass Heart season 1 release date, cast details, where to watch, episode count, and other latest updates so far

Japanese musical drama Glass Heart season 1 will premiere on Netflix on July 31, 2025. A story of struggle and passion in the music industry, the new series follows the fictional band TENBLANK on their journey to success and beyond.

The series revolves around Akane, a rejected drummer who finds a spot in the musical genius Naoki Fujitani's band, TENBLANK. Taking the band to new heights is the main goal for the four-member band, which they achieve through their collective efforts. However, the journey ahead is not easy, as there are multiple obstacles that they must overcome.

Starring Takeru Satoh, Yu Miyazaki, Keita Machida, and Jun Shison, the series promises to bring an authentic musical experience with exclusive songs and concert scenes.

---

Release date for Glass Heart season 1, and how many episodes will be in the musical drama

All the members of the band TENBLANK from the series (Image via X/@NetflixJP)

Glass Heart season 1 will bring the musical journey to fame of Naoki Fujitani, Akane, Sho Takaoka, and Kazushi Sakamoto, together known as TENBLANK. The series has eight episodes and will release on July 31, 2025.

Glass Heart season 1 is a special project that brings prominent Japanese actors together. From learning music to preparing for over a year, the cast has put in tremendous effort. The series is expected to premiere at 12 a.m. PT/ 3 a.m. ET. Release timings for other prominent regions are listed below:

Region	Release Date	Release Time
United States (Eastern Time)	July 31, 2025	3:00 am ET
United States (Pacific Time)	July 31, 2025	12:00 am PT
United Kingdom (BST)	July 31, 2025	8:00 am BST
Japan (JST)	July 31, 2025	4:00 pm JST
South Africa (SAST)	July 31, 2025	9:00 am SAST
India (IST)	July 3, 2025	12:30 pm IST
Central Europe (CEST)	July 31, 2025	9:00 am CEST
Australia (AEST)	July 31, 2025	5:00 pm AEST

---

Where to watch Glass Heart season 1?

Glass Heart season 1 is a Netflix original series, and the global audience can binge-watch the musical journey of TENBLANK. All eight episodes will drop simultaneously on the streaming platform.

To watch this series, viewers can subscribe to Netflix through their available subscription plans. A standard with ads plan brings limited titles, two devices (at a time) viewing options, and Full HD content at $7.99 per month.

The standard plan, priced at $17.99/month, brings unlimited, ad-free, and full HD content to viewers, which can be streamed on up to two devices at a time with download options. An extra member can be added to the plan with an additional cost of $8.99/month (ad-free) or $6.99 (with ads).

Netflix's premium plan costs $24.99/month and offers unlimited, 4K Ultra HD content, which is supported on four devices at a time. An additional two members can be added to the plan for $8.99/month (ad-free) or $6.99 (with ads).

---

All cast members in Glass Heart season 1

TENBLANK band from the series (Image via X/@NetflixJP)

Glass Heart season 1 brings together some of the renowned Japanese actors for a musical journey. Centered around the fictional band, TENBLANK, the lead vocalist, Naoki Fujitani, is played by Takeru Satoh. Yu Miyazaki portrays the young drummer Akane. Guitarist Sho Takaoka is played by Keita Machida, and Kazushi Sakamoto, the band's keyboardist, is portrayed by Jun Shison.

Given below is the list of other cast members featured in Glass Heart season 1:

• Masaki Suda
• Erika Karata
• Akari Takaishi
• Pistol Takehara
• You
• Naohito Fujiki

Additionally, more than 5,000 extras were incorporated for the concert scenes to replicate the energetic atmosphere of music events.

---

What to expect from Glass Heart season 1?

A still from the series (Image via X/@NetflixJP)

There is more than just a rise to fame for TENBLANK in Glass Heart season 1. The series charts the growth of the band and individual members across the entire season.

A humiliating rejection turns young Akane dejected. But hope knocks at her door as she has an opportunity from the 'Amadeus of Rock', Naoki Fujitani. The exceptional vocalist and his other two band members, Sho Takane and Kazushi Sakamoto, take Akane as the drummer for their band.

While their music makes them popular far and wide, there is much more to encounter for Fujitani and his bandmates. He faces challenges in handling the rival singer, Toya Shinzaki, from the band OVER CHROME. Music producer Ichidai Isagi also poses as another hurdle for Fujitani and the team, with his envy bringing difficulties for TENBLANK.

---

Final thoughts

Glass Heart season 1 attempts to be true to music with its storyline and unique ensemble of cast. Viewers can expect elaborate musical moments in the series, especially in the concert sequences, which have been filmed with 12 cameras and incorporate uniquely captured shots. The film is based on the novel Glass Heart by Mio Wakagi.

The series song Crystalline Echo (旋律と結晶) has also been released with an official lyric video on July 2, 2025. The main trailer unveiled a short snippet of the main track Glass Heart performed by Takeru Satoh, raising anticipation for all the songs that the series will include.

Directed by Kohtaro Goto and Kensaku Kakimoto, the original score for the series is composed by Masakatsu Takagi. A total of 26 music artists, such as Taka (ONE OK ROCK), Yojiro Noda, Ryujin Kiyoshi, Yaffle, Yohei Kawakam [Alexandros], Tanaka, TeddyLoid, and Zarame, among others, have contributed to the music of the series.

With such significant contributions, it is anticipated to witness whether Glass Heart season 1 will musically capture the hearts of the global audience.

---

Stay tuned for more updates.