IS:SUE 's first album, "QUARTET," is scheduled to be released on Wednesday, May 20, 2026.

Pre-orders will start today at various online shops and CD shops.

Haven't you heard? IS:SUE

"Four people, four different colors, a diverse quartet, IS:SUE, plays a perfect harmony"

IS:SUE (pronounced: Ish) is a girl group that debuted from "PRODUCE 101 JAPAN THE GIRLS," the first girls' version of the survival audition program that became the largest program ever produced in the Japanese entertainment industry.

Since his debut, he has steadily improved his skills step by step, and has consistently been a "different" new HERO since his birth.

IS:SUE has continued to present itself as it is, "being yourself."

The youngest member, RIN, who had been on hiatus for recuperation, recently returned.

The long-awaited first full album, finally released as a four-member group!

"QUARTET" (pronounced: Quartet) marks a new beginning for IS:SUE

Don't miss the diverse "quartet" performed by RIN, NANO, YUUKI, and RINO.

The first limited editions A and B are digipack versions and include an original photo book for each format.

The FC limited edition features a solo jacket for each member and comes in a special 7-inch paper jacket.

The UNIVERSAL MUSIC STORE exclusive edition will include special footage from the "IS:SUE Special YouTube Live Show," which was live-streamed on February 12, 2026 and became a hot topic due to the four members' first performance as a complete group.

In addition, this album will feature new versions of previously released songs performed by the four-member group.

Please see below for details on the recording contents and stay tuned for further updates.

On Sunday, May 24, 2026, "2026 IS:SUE 1ST TOUR FINAL -IS:SUE IS COMING" will be held at the Tokyo Garden Theater, which has the largest capacity of his own, as an additional show to his first nationwide tour "2025 IS:SUE 1ST TOUR -IS:SUE IS COMING" which was a huge success with tickets selling out immediately.

Don't miss out on IS:SUE which is currently going strong.

【Product Summary】

▼Title

1st Album "QUARTET" (Read: Quartet)

▼Release date: Wednesday, May 20, 2026

▼Number of formats: 8 formats

◆First limited edition A [CD + PHOTOBOOK]

Price: ¥4,000 (excluding tax) / ¥4,400 (including tax)

Product code: UMCK-7312

Specifications: Digipack specifications

(CD)

New songs and more

＜First press limited edition＞

1 Polaroid-style trading card (1 of 5 types randomly included)

1 trading card (1 randomly selected from 5 types in the first limited edition A ver.)

◆First Press Limited Edition B [CD + PHOTOBOOK]

Price: ¥4,000 (excluding tax) / ¥4,400 (including tax)

Product code: UMCK-7313

Specifications: Digipack specifications

(CD)

New songs and more

＜First press limited edition＞

1 original postcard (1 of 5 types randomly included)

1 holographic selfie trading card (1 randomly selected from 5 types)

◆Regular edition [CD ONLY]

Price: ¥3,000 (excluding tax) / ¥3,300 (including tax)

Product number: UMCK-1825

Specifications: Jewel case specifications

(CD)

New songs and more

＜First press limited edition＞

1 selfie trading card (1 of 8 close-up versions randomly included)

1 sticker sheet

◆UNIVERSAL MUSIC STORE Limited Edition [CD+DVD]

Price: ¥3,500 (excluding tax) / ¥3,850 (including tax)

Product code: PDCS-1940

Specifications: Jewel case specifications

(CD)

New songs and more

(DVD)

Special footage from the live broadcast "IS:SUE Special YouTube Live Show" on February 12, 2026

＜First press limited edition＞

1 trading card (1 randomly selected from 5 UNIVERSAL MUSIC STORE versions)

*Events for the UNIVERSAL MUSIC STORE limited edition will be announced at a later date.

◆FC Limited Edition [CD ONLY / 4 types with individual member solo jackets]

Price: ¥3,500 (excluding tax) / ¥3,850 (including tax)

- RIN (product number: PROS-1952)

-NANO (product number: PROS-1953)

-YUUKI (product number: PROS-1954)

-RINO (product number: PROS-1955)

Specifications: 7-inch size, paper jacket

(CD)

New songs and more

＜First press limited edition＞

1 selfie trading card (1 of 3 types randomly included for each member, the same as the solo jacket)