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.
・The event runs until Sunday, December 20, and will be held at all Round One locations
・Collaboration merchandise and capsule toys will be sold at only five locations nationwide
・There are seven locations that will not sell collaboration drinks or food
・Promotional items will alternate: photo metal cards in the first half and acrylic keychains in the second half
“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.
©2011 5pb./Nitroplus Mirai Gadget LaboratoryThe 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.
©2011 5pb./Nitroplus Mirai Gadget LaboratoryParticipating 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.
| Product Name | Type | Price (Tax Included) |
|---|---|---|
| Life-Size Pin Badges | 8 varieties total (random) | 660 yen each |
| Acrylic Stands | 8 varieties total | 2,200 yen each |
| Mini Character Pin Badges | 8 varieties total (random) | 660 yen each |
| Desk Mat | 1 design | 3,960 yen *On sale starting Thursday, November 5 |
| Tote Bag | 1 design | 3,850 yen |
| Postcard Set | 1 design | 1,650 yen |
| Stainless Steel Tumbler | 1 design | 3,850 yen |
| B2 Tapestry | 1 design | 3,850 yen *On sale starting Thursday, November 5 |
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.
©2011 5pb./Nitroplus Mirai Gadget LaboratoryAcrylic Stands / 8 Varieties Total
Each costs 2,200 yen (tax included). The bases feature gears in different colors for each character.
©2011 5pb./Nitroplus Mirai Gadget LaboratoryMini-Character Pin Badges / 8 Varieties Total
660 yen each (tax included). These are also randomly selected.
©2011 5pb./Nitroplus Mirai Gadget LaboratoryDesk Mat / 1 design
3,960 yen (tax included). Sales begin on Thursday, November 5.
©2011 5pb./Nitroplus Mirai Gadget LaboratoryTote 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.
©2011 5pb./Nitroplus Mirai Gadget LaboratoryStainless Steel Tumbler / B2 Tapestry
Both are 3,850 yen (tax included); one design available. The B2 tapestry goes on sale Thursday, November 5.
©2011 5pb./Nitroplus Mirai Gadget LaboratoryImportant Notes Regarding the Sale of Collaboration Merchandise
- Sales begin at 10:00 AM on the start date of the collaboration campaign.
- Depending on store traffic, numbered tickets may be distributed.
- 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.
- 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.
- The X accounts for each collaboration merchandise store will not respond individually to inquiries regarding the collaboration merchandise.
- You may purchase collaboration merchandise only.
- 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.
©2011 5pb./ Nitroplus Mirai Gadget LaboratoryThe 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
©2011 5pb./Nitroplus Mirai Gadget Laboratory| Menu Name | Contents |
|---|---|
| Kyoma Hououin’s Madness Soda | Coke / Whipped Cream / Grape Syrup / Pocky |
| Tuturu♪ Mayushi Blue Soda | Blue Hawaii Syrup / Calpis Soda / Whipped Cream / Piccola |
| Super Hacker’s Squishy Pink Soda | Calpis Syrup / Strawberry Syrup / Calpis Soda / Whipped Cream / Colored Chocolate Sprinkles / Pocky |
| The Tsundere Assistant’s Red Berry Soda | Strawberry Syrup / Sparkling Water / Whipped Cream / Strawberry Sauce / Fresh Chocolate |
| Shining Finger Moeku’s Orange Soda | Orange Syrup / Strawberry Syrup / Sparkling Water / Whipped Cream / Mango Sauce / Lemon |
| Ruka’s Orange Soda from Yanagibayashi Shrine | Orange Syrup / Strawberry Syrup / Sparkling Water / Whipped Cream / Chocolate Sauce / Cherry |
| Feiris’s Nyan-Nyan Colorful Soda | Grape Syrup / Calpis Soda / Whipped Cream / Colored Chocolate Sprinkles / Mango Chunks / Cherry |
| Part-Time Warrior Suzuha’s Time Travel Soda | Grape Syrup / Calpis Soda / Whipped Cream / Colored Chocolate Sprinkles / Pocky |
Collaboration Food: 2 varieties total / 1,090 yen each
©2011 5pb./Nitroplus Mirai Gadget Laboratory| Menu Name | Description |
|---|---|
| Future Gadget Laboratory★ Lab Member Plate | Butter Salt Popcorn / Consommé Potato Chips / Pocky / Piccola / Whipped Cream / Colored Chocolate Sprinkles / Shrimp Crackers |
| Gelvana Choux Tower | Mini Choux / Whipped Cream / Chocolate Sauce / Melon Syrup / Mango Sauce / Colored Chocolate Sprinkles / Cherries |
| Bowling 2-Game Pack | General/Students: 2,060 yen *Shoe rental fee not included |
|---|---|
| Bowling Unlimited Lanes Pack | General Admission: 2,980 yen / Students: 2,830 yen *Shoe rental fee not included |
| Karaoke 120-Minute Pack | Weekdays: OPEN–7:00 PM: 2, ,000 yen / Weekdays 7:00 PM–CLOSE: 2,300 yen / Weekends, Holidays, and the Day Before a Holiday: 2,300 yen *One drink order required per person |
| Spoccha 3-Hour Package | General Admission: Weekdays 3,240 yen, Weekends & Holidays 3,440 yen / College Students, Vocational Students, Middle & High School Students: Weekdays 2,890 yen, Weekends & Holidays 3,090 yen / Elementary School Students: Weekdays 2,790 yen, Weekends & Holidays 2,990 yen / Preschoolers (ages 2 and up): 1,400 yen, Under 2 years old: Free |
| Spoccha Free Time Pack | General Admission: Weekdays 3,640 yen, 3,740 yen on weekends and holidays / College students, vocational school students, and middle/high school students: 3,390 yen on weekdays, 3,490 yen on weekends and holidays / Elementary school students: 3,290 yen on weekdays, 3,390 yen on weekends and holidays / Preschoolers (ages 2 and up): 1,450 yen; under 2 years old: Free |
| Pool or Darts Free Time Pack | Includes all-you-can-drink / Weekdays OPEN–12:00: 1,740 yen / Weekdays 12:00–20:00: 1,890 yen / Weekdays 20:00–CLOSE: 2, 050 yen / Weekends and Holidays: Open–12:00 PM: 2,050 yen / Weekends and Holidays: 12:00 PM–Closing: 2,170 yen |
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.
©2011 5pb./Nitroplus Mirai Gadget LaboratoryYou 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).
©2011 5pb./Nitroplus Mirai Gadget LaboratoryThe second half, featuring a total of 2 varieties, will be available from Thursday, November 5, 2026, through Sunday, December 20, 2026.
©2011 5pb./Nitroplus Mirai Gadget LaboratoryThe 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
- Reservations are required in principle. You can make reservations via the website or the app.
- 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.
- There are no discounts for club members.
- A minimum of one order per person is required.
- 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.
- 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.
©2011 5pb./Nitroplus Mirai Gadget Laboratory| Event Period | September 18, 2026 (Fri) – December 20, 2026 (Sun) |
|---|---|
| Number of Games | 2 games (2 consecutive games) *No handicap |
| Participation Fee | Free *Game fees and shoe rental fees are separate |
| Eligibility Requirements | Users of the Bowling Collaboration 2-Game Pack or the Collaboration Unlimited Lanes Pack |
| Number of Participations | Collaboration 2-Game Pack: 1 time / Collaboration Unlimited Lanes Pack: Unlimited *For both, only one Total Score Achievement Prize may be claimed |
| How to Participate | Participate by pressing the “Free Time Competition” button on the bench monitor *You must speak to a staff member |
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.
©2011 5pb./ Nitroplus Mirai Gadget LaboratoryYou 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.
©2011 5pb./Nitroplus Mirai Gadget LaboratoryAmusement 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.
©2011 5pb./Nitroplus Mirai Gadget LaboratorySocial 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.
©2011 5pb./Nitroplus Mirai Gadget LaboratoryThe 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.
©2011 5pb./Nitroplus Mirai Gadget LaboratoryThe 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
©2011 5pb./Nitroplus Mirai Gadget Laboratory| Event Name | Steins; Gate × Round One Collaboration Campaign |
|---|---|
| Event Period | September 18, 2026 (Fri) 10:00 AM – December 20, 2026 (Sun) |
| Event Location | All Round One locations *Participating locations may vary depending on the event |
| Participating Areas | Bowling / Karaoke / Spoccha / Billiards / Darts / Amusement |
| Stores Selling Merchandise and Capsule Toys | Sendai Izumi Store 1F / DiverCity Tokyo Plaza Store 6F / Ikebukuro Store 4F / Saikaya Yokosuka Store South Wing 5F / Sennichimae Store 4F |
| Collaboration Menu Participating Locations | 93 locations offering bowling, karaoke, billiards, and darts *7 locations are excluded |
| Collaboration Rooms | 1 location at DiverCity Tokyo Plaza Store (Tokyo) |
| Promotional Items | First Half: 8 types of photo metal cards (September 18–November 4) / Second Half: 8 types of acrylic keychains (November 5–December 20) |
| Official Website | Steins;Gate × Round One Special Site |
| Official X | Round One LIVE Official (@round1_fanevent) |
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
When is the event held?
From 10:00 AM on Friday, September 18, 2026, through Sunday, December 20, 2026.
At which locations is the event held?
The collaboration will be held at all Round One locations. However, participating stores vary by promotion. Collaboration merchandise and capsule toys are available at 5 stores; collaboration drinks and food at 93 stores; and the collaboration room is available at only 1 store.
Where can I buy the collaboration merchandise?
They are available at five locations: Sendai Izumi Store (1F), DiverCity Tokyo Plaza Store (6F), Ikebukuro Store (4F), Saikaya Yokosuka Store (South Wing, 5F), and Sennichimae Store (4F). You can also purchase collaboration merchandise on its own.
Are there any stores where I can’t order the collaboration menu items?
Yes. The following seven locations do not sell collaboration drinks or food: Aomori, Omiya, Musashimurayama, Chikusa, Moriguchi, Chofu Ekimae, and Machida Giorna. At five of these locations, a drink with a promotional gift is available for 650 yen (tax included).
How do I get the promotional item?
You’ll receive one for every item you order from the collaboration drinks, collaboration food, custom drinks, or popcorn. During the first half (September 18–November 4), the giveaway is a photo metal card; during the second half (November 5–December 20) you’ll receive an acrylic keychain. You cannot choose the type.
Where are the collaboration rooms located?
They are available exclusively at the Diversity Tokyo Plaza location in Tokyo. Reservations are required in principle and and reservations can be made via the website or app. Use is limited to the 100-minute package, and there is a one-order-per-person requirement.
Can I use my Club Member discount?
No, you cannot. The Collaboration Pack and Collaboration Room Pack are not eligible for the Club Member discount. They are also excluded from the free admission campaign for elementary and junior high school students.
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
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