IS:SUE releases album QUARTET May 20

IS:SUE released its first full album, “QUARTET,” on Wednesday, May 20, according to the group’s official website and YouTube channel. The release gives the four-member act its first album-length project after earlier singles and performance videos posted across its official platforms. (is-sue.jp) The group’s English-language profile identifies the members as RIN, NANO, YUUKI and RINO. The album rollout on Wednesday also included a YouTube Live promotion linked from the group’s official channel. The official “QUARTET” page frames the project around the group’s four-member identity. (youtube.com) IS:SUE’s site says the act emerged from “PRODUCE 101 JAPAN THE GIRLS,” and the album materials repeatedly use quartet language in both the title and packaging. The release date of May 20, 2026 appears on the group’s official news page, feature page and YouTube channel header. ### What exactly came out on May 20? The official album page lists “QUARTET” as IS:SUE’s first album and shows multiple physical editions alongside the May 20 release date. The standard tracklist on the official feature page includes 13 songs: “Intro,” “Quartet,” “No.4,” “Chemistry,” “4 Beats,” “Windy,” “New Moon,” “Telepathy,” “CONNECT,” “THE FLASH GIRL,” and three “QUARTET ver.” tracks. (is-sue.jp) The LAPONE Store reservation page shows the album was sold in several formats, including limited editions and member-specific versions. Store materials also listed release-linked purchase bonuses such as postcards and trading cards, depending on edition. (is-sue.jp) ### Why is the album called “QUARTET”? IS:SUE’s official site describes the act as a four-member girl group made up of RIN, NANO, YUUKI and RINO. The album branding leans into that structure: the title is “QUARTET,” one track is called “No.4,” and the Japanese release announcement described the project as the group’s first album for the four members. (is-sue.jp) The official feature page also presents different member editions, each tied to one of the four performers. That packaging mirrors the group’s lineup and reinforces the four-member framing used throughout the release campaign. (store.lapone.jp) ### Which songs were pushed ahead of the album? YouTube listings on IS:SUE’s official channel show “Quartet” was promoted with teaser videos and an official music video ahead of the album date. The channel page says “Quartet” had an official MV released on May 8 at 7:00 p.m. JST, and the official MV was visible on the group’s YouTube channel in the days before the album release. (is-sue.jp) A YouTube playlist tied to “QUARTET” also shows album tracks uploaded around the release window. That playlist included “Intro,” “Quartet,” “No.4,” “Chemistry,” “4 Beats,” “Windy,” “New Moon,” “Telepathy,” “CONNECT,” “THE FLASH GIRL,” and additional “QUARTET ver.” recordings. (is-sue.jp) ### What was the May 20 YouTube Live for? IS:SUE’s official channel promoted a release-day YouTube Live connected to “QUARTET.” Search results for the channel and the linked live page show the event was billed around talking together about the “Quartet” music video, with the stream scheduled for about 7:30 p.m. (youtube.com) JST on May 20. A separate short on the same channel also advertised a “Special YouTube Live Show” tied to the album’s May 20 release. Social promotion referenced games, comments from fans and the live-stream link as part of the launch-day push. (youtube.com) ### What comes next after the album release? IS:SUE’s official YouTube channel lists a “2026 IS:SUE 1ST TOUR FINAL - IS:SUE IS COMING” additional performance at Tokyo Garden Theater on May 24. The same channel page also advertises “REBORN Collection 2026” anniversary events on June 14 at Orix Theater and June 19 at Kanadevia Hall. (youtube.com 1) (youtube.com 2)