A collaboration campaign between “Steins;Gate”—which is celebrating its 15th anniversary—and Round One will be held nationwide from 10:00 AM on Friday, September 18, 2026, through Sunday, December 20!
Collaboration merchandise, drinks, and giveaways will be available in the bowling, karaoke, Spoccha, billiards, darts, and amusement areas.

“Steins;Gate” × Round One Collaboration Starts September 18!

A collaboration campaign between “Steins;Gate” and Round One will be held. The event runs from 10:00 AM on Friday, September 18, 2026, through Sunday, December 20.

The campaign will be held at all Round One locations and will feature activities in the bowling, karaoke, Spoccha, billiards, darts, and arcade game areas. In the key visual, eight characters—including Rintaro Okabe and Kurisu Makise—are wearing outfits adorned with the Round One logo.

Participating locations vary by promotion. The collaboration pack, bowling-related promotions, and amusement promotions are available at all locations. Collaboration merchandise and capsule toys are available at 5 locations, collaboration drinks and food at 93 locations, and the collaboration room at only 1 location.

Steins;Gate × Round One Collaboration Merchandise

Collaboration merchandise is available at 5 locations nationwide: the 1st floor of the Sendai Izumi Store in Miyagi; the 6th floor of the DiverCity Tokyo Plaza Store and the 4th floor of the Ikebukuro Store in Tokyo; the 5th floor of the South Wing at the Saikaya Yokosuka Store in Kanagawa; and the 4th floor of the Sennichimae Store in Osaka.

The desk mat and B2 tapestry will not be available at the start of the collaboration but will go on sale starting Thursday, November 5. If you’re planning to purchase these two items, you’ll need to time your visit accordingly.

Life-Size Pin Badges / 8 Varieties Total

Each costs 660 yen (tax included). Varieties are random; you cannot choose the specific design.

Acrylic Stands / 8 Varieties Total

Each costs 2,200 yen (tax included). The bases feature gears in different colors for each character.

Mini-Character Pin Badges / 8 Varieties Total

660 yen each (tax included). These are also randomly selected.

Desk Mat / 1 design

3,960 yen (tax included). Sales begin on Thursday, November 5.

Tote Bag / Postcard Set

The tote bag is 3,850 yen (tax included), and the postcard set is 1,650 yen (tax included). Both are available in 1 design.

Stainless Steel Tumbler / B2 Tapestry

Both are 3,850 yen (tax included); one design available. The B2 tapestry goes on sale Thursday, November 5.

Important Notes Regarding the Sale of Collaboration Merchandise

1. Sales begin at 10:00 AM on the start date of the collaboration campaign.
2. Depending on store traffic, numbered tickets may be distributed.
3. Information regarding whether numbered tickets will be distributed, on-site guidelines, notifications regarding sold-out items or restocks will be posted on the X accounts of each participating store. Information may vary by store.
4. Please be considerate of local residents and facility users when waiting near the store prior to the sales start time or the time when each store begins distributing numbered tickets or forming lines along the wall.
5. The X accounts for each collaboration merchandise store will not respond individually to inquiries regarding the collaboration merchandise.
6. You may purchase collaboration merchandise only.
7. Purchases or reservations for the purpose of resale, as well as drop shipping, are prohibited.

Steins;Gate × Round One Capsule Toys

Mini acrylic stands are now available for 500 yen (tax included) per play. There are 8 varieties in total, each featuring a gear-shaped base in a color unique to its character.

The capsule toys are available at the same five stores as the collaboration merchandise: the 1st floor of the Sendai Izumi Store in Miyagi; the 6th floor of the DiverCity Tokyo Plaza Store and the 4th floor of the Ikebukuro Store in Tokyo; and the South Wing, 5th floor; and the Sennichimae Store, 4th floor, in Osaka.

Steins;Gate × Round One Collaboration Drinks & Food

The collaboration drinks and food are available at 93 locations offering bowling, karaoke, billiards, and darts. You can order them while you’re there.

Collaboration Drinks: 8 Varieties / 850 yen each

Collaboration Food: 2 varieties total / 1,090 yen each

Club member discounts do not apply to the Collaboration Pack. The free admission campaign for elementary and junior high school students is also not applicable. The Chofu Ekimae and Machida Giorna locations are crane game parks and therefore do not offer the Collaboration Pack.

Collaboration Room

The Collaboration Room is available exclusively at the Diversity Tokyo Plaza location in Tokyo. The room is decorated in a *Steins;Gate* theme.

You can also receive a B4 visual mat by using the Collaboration Room. The first half runs from Friday, September 18, 2026, through Wednesday, November 4 (Wed).

The second half, featuring a total of 2 varieties, will be available from Thursday, November 5, 2026, through Sunday, December 20, 2026.

The Karaoke Collaboration Room Pack rates are 2,100 yen for both general and student customers on weekdays from opening until 6:00 PM, 2,400 yen on weekdays from 6:00 PM until closing, and 2,400 yen on weekends and holidays (tax included).

Collaboration Room Terms of Use

1. Reservations are required in principle. You can make reservations via the website or the app.
2. Use is limited to 100-minute packages. Only for use between midnight and 5:40 a.m., you can use the room for up to 5 hours and 40 minutes until 5:40 a.m.
3. There are no discounts for club members.
4. A minimum of one order per person is required.
5. Special collaboration rooms also operate on a reservation-only basis as a general rule. You may use the room during times without reservations, but only until the next reserved guest’s time slot begins.
6. Collaboration room packages cannot be extended. If you wish to continue using the room after 100 minutes have elapsed, you must settle your bill and check in again.

Steins;Gate × Round One Bowling Event

Two promotions are being held at the bowling alley: a score registration campaign and special score animations.

Bowling Score Registration Campaign

Bowl two games; if your combined score is 170 or higher for men or 140 or higher for women, you’ll receive an A5 clear file. There are two designs available.

Bowling Score Animations

The animation screen after each throw will feature a Steins;Gate theme. This applies to the following 8 types of shots: turkey, double, strike, spare, 1-pin left, split, gutter, and miss.

You can set up the special effects on your tablet. From the main screen, select “Score,” then choose “Collaboration Effects,” and finally select “Steins;Gate.”

Steins;Gate × Round One Amusement Project and Social Media Campaign

This promotion is available at all Round One locations.

Crane Game Collaboration Prizes

One type of acrylic board will be available. Offer ends when supplies run out.

Amusement Experience Bonus

If you inform a staff member in advance that you wish to participate and then play the eligible crane game by inserting 500 yen or more consecutively, you will receive an A5 clear file. There are two designs available.

Social Media Follow & Repost Campaign

Follow Round One LIVE’s official X account (@round1_fanevent) and repost to enter a drawing where 3 winners will receive a prize.

The first installment features a complete set of all 8 types of Photo Metal Cards from the first half of the series, and the campaign runs from Friday, September 11, 2026, through Thursday, September 17, 2026, at 11:59 PM.

The second installment features a complete set of all 8 types of acrylic keychains. The campaign runs from Thursday, November 5, 2026, through Wednesday, November 11 (Wed) at 23:59.

Steins;Gate × Round One: Taking place at Round One locations nationwide from September 18 to December 20

The “Steins;Gate” × Round One collaboration campaign will be held from September 18, 2026 (Friday) at 10:00 AM through December 20 (Sunday). Since participating stores vary by promotion, if you have specific merchandise or menu items in mind, be sure to check in advance whether the store you plan to visit is participating.

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Steins;Gate × Round One Frequently Asked Questions

Please check the official website for details.
*Please note that the information in this article may be out of date; we ask that you check the official website for the latest details.

©2011 5pb. /Nitroplus Mirai Gadget Laboratory