2.5D Utaite Group Ireisu Holds First Fan Club Event! Intense Team Battle & Emotional Finale [Part 2 Report]

ireisu Holds First Fan Club Event “Irregular Party!! Vol.1”

The 2.5D utaite group ireisu held their first fan club event, “ireisu Fan Club Event ～ Irregular Party!! ～ Vol.1”, at J:COM Hall Hachiouji on June 8, 2025. This article will cover the second part of this special day, which brought fans and the members closer together through team-based games, a live Q&A corner, and a mini-live.

ireisu (Irregular Dice) is a next-generation utaite group consisting of six members: Riura, -hotoke-, Shouto, Naiko, If, and Yuusuke. They belong to the 2.5D idol group agency VOISING. Formed in October 2020, they primarily release cover songs, original songs, variety videos, and hold live streams. Outside of the internet, they also hold live concerts and collaborative events, and their popularity is rapidly growing.

In 2023, they successfully completed a hall tour across six cities nationwide, and in February 2024, they fulfilled a promise to their fans and a long-held dream by holding a live concert at the Nippon Budoukan just three years after their formation. On November 30 and December 1, 2024, they held their first-ever dome concerts over two days at Belluna Dome. Looking ahead to the summer of 2025, they are scheduled to hold their first nationwide arena tour, with all venues being arenas.

This event kicked off with the familiar “ireisu to no Yakusoku” (Promise with ireisu), a phrase used at the opening of their weekly YouTube fan meetings, which was recited “in real life” together with the fans in attendance.

This special performance, unique to the fan club event, where fans and members in the same space vocally confirmed the promise they usually exchanged through screens and comments, created a strong sense of unity throughout the venue. As the ireisu members appeared on stage, they introduced themselves in a special order different from their usual “dice number order,” setting a warm and lively atmosphere from the very beginning of the event.

Team Battle: ireisu × irerisu Kakuzuke Check

The main segment of the second part was a team-based parody game called “ireisu × irerisu Kakuzuke Check”, an homage to a popular television show. The content, which was quite different from their usual live performances and streams, heightened the fans’ anticipation. While Naiko, the leader, usually hosts, for this event, If took on the role of MC. He kept the event lively with his quick wit and smooth progression.

The competition was between two teams: “Team Irregular” consisting of Riura, Naiko, and Yuusuke, and “Team Dice” consisting of -hotoke-, Shouto, and If. The audience seats were also divided by team, allowing for interactive participation. Both teams started at the highest rank, “Gohon’nin-sama” (The Real Deal), and answered two-choice questions related to ireisu. If they answered incorrectly, their rank would drop to “Gachizei” (Hardcore Fans), “Chuukyuusha” (Intermediate), and “Minarai” (Apprentice), with their seating changing accordingly.

The questions were unique, asking about episodes and special skills related to ireisu. The members answered, sometimes referencing the fans’ voices in the audience. A particularly noteworthy moment was the third question, which involved a practical test: whether -hotoke- could successfully catch a marshmallow within three tries. The demonstration was performed on stage, but he unfortunately failed, making “cannot do it” the correct answer.

As a result, Team Dice was demoted to “Gachizei” and moved to simpler chairs. Meanwhile, Team Irregular continued to answer all questions correctly, maintaining their “Gohon’nin-sama” rank. At one point, Riura even playfully provoked the other team, saying, “Our chairs are super soft,” making the exchanges between the teams a major highlight of the event.

In the latter half of the game, Team Dice had a string of incorrect answers, ultimately dropping out of the ranks entirely. They ended up sitting on a sheet placed on the floor. Following this, they had to undergo a foot massage as a penalty. Suzuki-san from Dr. Foot appeared on stage, and -hotoke- and If, excluding Shouto who had already received a massage in the first part, received the foot treatment while being held down by the other members. Their agonizing reactions drew laughter and cheers from the audience.

Afterward, Riura and Naiko, who hadn’t received a penalty yet (unlike Yuusuke who had in the first part), also had to get a foot massage, resulting in all the members having their soles stimulated.

Live Q&A: nama Shitsumon!? Gati Box Time!

Following the game segment, the “nama Shitsumon!? Gati Box Time!” corner was held, where seating numbers were randomly drawn from boxes representing the 1st, 2nd, and 3rd floor seats. The selected fans had the chance to directly ask questions or share their thoughts with the members.

This allowed for real-time interactions that are usually difficult to achieve. Warm applause and cheers were sent from across the venue to the chosen fans. The members answered sincerely, sometimes weaving in humor to draw laughter from the audience, making it a time to deepen the bond with their fans even further.

Concluding with a Special Mini-Live

Crowning the event’s finale was the mini-live segment, where each member performed a song they had personally chosen, expressing their desire to deliver it to their fans “in this moment.” A special setlist, unique to the fan club event and not usually seen at their regular lives, was performed, instantly drawing the entire venue into live mode.

Riura started as the top batter with his chosen song “Hajimari no Oto” (The Sound of the Beginning), followed by -hotoke- with “Koi no MAGIC” (Magic of Love), If with “Ai wo Utau” (Singing of Love), and Shouto with “C.O.G”. The performances, each filled with the members’ individuality, gradually raised the heat of the venue. In between songs, the members shared MCs reflecting on the event’s memories, creating a warm atmosphere as if the stage and the audience had become one circle.

Furthermore, to commemorate this special time, a photo was taken with all the fans in the venue and the ireisu members, capturing a moment filled with smiles. The mini-live was then concluded with Yuusuke’s chosen song “Trace of Lightning”, and finally Naiko’s “Seventh!”. Enjoying the time with their fans to the fullest over a total of six songs, the event reached a touching conclusion.

《Nakase Koutarou》

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