The 2.5-dimensional idol group “Ireisu” will take over the entire Lalaport TOKYO-BAY and LaLa Terrace TOKYO-BAY complexes.

From September 14 to September 23, 2026, the venues will feature special decorations, in-mall background music, fan-participation cheering boards, and the distribution of limited-edition promotional items.

Ireisu × LaLaport TOKYO-BAY Event Overview

The 2.5-dimensional idol group “Ireisu” will take over LaLaport TOKYO-BAY and LaLa Terrace TOKYO-BAY in Funabashi, Chiba, on a massive scale. As part of an event timed to coincide with their summer tour concerts on September 21 and 22 at the adjacent LaLa Arena TOKYO-BAY, various areas throughout the complex will be decked out in Ireisu colors.

*The start date of the limited-edition giveaway campaign has been postponed to September 19 due to a delay in the delivery of the giveaways
*Receipts from September 14 through 18 will be eligible for the campaign if presented on or after September 19
*The dates vary by promotion. Check the LaLaport official website for the latest information

Limited-Edition “Clear Bookmark” Giveaway

When you shop or dine at participating stores inside the mall, you’ll receive a limited-edition giveaway—available only here—on a first-come, first-served basis. These clear bookmarks feature stylized illustrations from the summer tour visuals and come in two designs—one for adults and one for children—distributed at random.

©VOISING Inc.

If you present a single receipt totaling 3,000 yen (including tax), you will receive two promotional items. A maximum of six items per person per visit.

*Only paper receipts issued on the day of purchase are eligible. Electronic receipts, receipt images, and screenshots are not eligible
* Receipts cannot be combined. The total amount on a single receipt cannot be split among multiple people
* A “Paid” stamp will be applied to the receipt
* Credit card sales slips, various statements, movie tickets, vending machine receipts, gift certificates, and prepaid card top-ups are not eligible
*Due to limited quantities, this offer ends when supplies run out
*For a list of excluded stores, visit the LaLaport official website

“Support Board” Delivered to the Members’ Dressing Room

“Cheer Boards” where you can write messages directly to the members will be set up inside the venue. The collected messages will be delivered in person to the backstage entrance of LaLa Arena TOKYO-BAY during the Chiba performances on September 21 and 22. This is a participatory event that lets you cheer on the members from behind the scenes as they prepare for their live show.

In-Mall Decorations and BGM Broadcasts

The 2nd-floor connecting corridor and food court at LaLa Terrace TOKYO-BAY will be adorned with special decorations featuring live visuals. Various areas throughout LaLaport TOKYO-BAY will also be decorated in the “Ireisu” style, creating a space where the members will welcome you the moment you step inside.

©VOISING Inc.

In addition to popular Ireisu tracks, the in-venue background music will feature exclusive collaboration voice clips recorded specifically for this event and available nowhere else. The broadcast period runs from September 14, September 17–18, and September 21 through the 23rd. Promotional videos for the summer tour will be shown on digital signage monitors in the food court and other common areas throughout the facility.

About Ireisu and the Summer Tour

“Ireisu (Irregular Dice)” is a 2.5-dimensional idol group under VOISING that was formed on October 9, 2020. Centered on internet-based activities such as cover song videos, original songs, and live streams, the group has expanded its scope to include live performances and corporate collaborations.

In February 2024, they realized their long-held dream of performing at the Nippon Budokan, and on November 30 and December 1 of the same year, they held their first-ever dome concert at the Belluna Dome. In the summer of 2025, they drew a crowd of approximately 90,000 people on their first nationwide arena tour.

In the summer of 2026, they are currently holding the “Ireisu Summer Tour 2026 Irregular Vacation -Colorful Street-,” touring 14 venues across 13 cities nationwide, starting with a performance at Mori no Hall 21 in Chiba on July 4. The tour will conclude with a performance at LaLa arena TOKYO-BAY on September 22.

Ireisu × LaLaport TOKYO-BAY FAQs

When and where will the collaboration take place?

It will be held from September 14 to September 23, 2026, at LaLaport TOKYO-BAY and LaLa Terrace TOKYO-BAY.

How can I get the limited-edition promotional items?

For every 1,500 yen (tax included) spent at participating stores within the complex, you’ll receive one item per paper receipt issued on the same day. Redemption takes place at the &mall Desk on the 1st floor of Lalaport TOKYO-BAY North Wing, with a limit of up to six items per person per visit.

I heard the start date of the giveaway campaign has changed

Due to a delay in the delivery of the giveaways, the start date has been postponed to September 19. Receipts from September 14 through 18 will still be eligible if presented on or after September 19.

Please check the official website for details.
*Please note that the information in this article may be out of date. We apologize for the inconvenience, but please check the official website for the latest information.

©VOISING Inc.