A collaboration campaign between the retro horror idol group “Phantom Theta,” produced by Ado, and ROUND1 will begin at 10:00 a.m. on September 14, 2026, at all ROUND1 locations.

For approximately three months, through December 13, the campaign will feature collaboration drinks and food inspired by the four members, order-based promotional giveaways, and various karaoke and bowling promotions.

{
“@context”: “https://schema.org”,
“@type”: “Event”,
“name”: “Phantom Theta × ROUND1 Collaboration Campaign”,
“startDate”: “2026-09-14T10:00”,
“endDate”: “2026-12-13”,
“eventStatus”: “https://schema.org/EventScheduled”,
“eventAttendanceMode”: “https://schema.org/OfflineEventAttendanceMode”,
“description”: “A collaboration campaign between the idol group “Phantom Theta,” produced by Ado, and ROUND1. The campaign features collaboration drinks and food, novelty items as order bonuses, collaboration packs, a karaoke collaboration room at the Kichijoji location, a karaoke singing campaign, and a bowling score registration campaign.”,
“image”: [
“https://collabo-cafe.com/wp-content/uploads/phantomsiita-round1-2026-eyecatch.jpg”
],
“location”: {
“@type”: “Place”,
“name”: “All ROUND1 locations”,
“address”: {
“@type”: “PostalAddress”,
“addressCountry”: “JP”
}
},
“organizer”: {
“@type”: “Organization”,
“name”: “Round One Co., Ltd.”,
“url”: “https://www.round1.co.jp/”
},
“isAccessibleForFree”: true,
“url”: “https://www.round1.co.jp/collaboration/phantomsiita/index.html”
}

Phantom Theta “ROUND1 Collaboration Campaign” Overview

A collaboration campaign between the retro horror idol group “Phantom Theta,” produced by Ado, and ROUND1 will begin on September 14, 2026, at 10:00 AM. The campaign features visuals of the four members—Mona, Miu, Rinka, and Momoka—dressed in ROUND1-style staff uniforms.

The campaign will take place at all Round One locations, with events held in the bowling, karaoke, Spoccha, billiards, darts, and arcade sections. However, the sale of collaboration menu items, capsule toys, and the use of collaboration rooms will be limited to select stores.

*Regarding all merchandise, promotional items, and room reservations, purchasing, reserving, or reselling for commercial purposes, or drop-shipping are strictly prohibited.

Phantom Theta “ROUND1 Collaboration Campaign” Collaboration Drinks and Food

Collaboration drinks are priced at 850 yen each (tax included), with a total of four varieties inspired by the four members. Available at 93 locations featuring bowling, karaoke, darts, and billiards.

*While bowling, karaoke, billiards, and darts.
*Drinks ordered while bowling will be served in “clear plastic cups.”
*You can view the allergen chart for the entire menu.
*Locations not offering the collaboration menu: Aomori Store / Omiya Store / Musashimurayama Store / Chikusa Store / Moriguchi Branch / Chofu Ekimae Branch / Machida Giorna Branch

Spoccha-Exclusive Custom Drinks and Popcorn

Available at all Spoccha locations, the “Custom Drink”—where you choose one from seven drink options and one from six ice cream toppings—is priced at 780 yen (tax included). Two types of popcorn will also be available.

* Orders are available only to guests currently using the Spoccha facilities. Orders cannot be placed while playing bowling, karaoke, billiards, darts, or table tennis.
*You must purchase a meal ticket from a vending machine inside the Spoccha facility and present it to a staff member.
*Available at 55 Spoccha locations nationwide.

Collaboration Drink Exchange Ticket and Drink with a Free Gift

If you order a collaboration drink, you can choose to receive a drink exchange ticket and a free gift instead of the drink itself. The exchange ticket can be redeemed for the eligible drink at the same location at a later date.

Additionally, at the five stores where the collaboration menu is not available, a “Drink with a Free Gift” priced at 650 yen (tax included) will be offered instead. This applies to the Aomori, Omiya, Musashimurayama, Chikusa, and Moriguchi locations.

*Payment is due upon receipt of the redemption ticket. The ticket is valid only during the collaboration campaign period indicated on the ticket.
*Tickets for collaboration food items will not be distributed. Tickets may not be transferred, resold, or for cash.
*Tickets are valid only at the store where they were issued. If used after settling the bill on the same day or during a subsequent visit, the facility usage fee must be paid again.
*No promotional items will be given upon using the ticket, and it does not count toward the karaoke minimum order requirement.
*Drinks with promotional items can only be ordered by customers using bowling or billiards, or darts at the five participating locations.

Phantom Theta “ROUND1 Collaboration Campaign” Order Bonus Giveaways

For every item ordered from the collaboration drinks, collaboration food, custom drinks, or popcorn, you will receive one original promotional item. The items available will change between the first and second halves of the campaign.

*You cannot choose the type of promotional item.
*Distribution will end once supplies run out.

Phantom Theta “ROUND1 Collaboration Campaign” Collaboration Pack

When you use the collaboration pack, you’ll receive one B4-sized visual mat as a gift from a selection of four designs. Special rates are set for bowling, karaoke, Spoccha, billiards, and darts, respectively.

*You cannot choose the type of B4 visual mat. This offer ends when supplies run out.
*The shoe rental fee is the same as the standard rate. If there is a wait even with the All-You-Can-Throw Collaboration Pack, you will be asked to take turns.
*The guaranteed number of games varies by location. Club member discounts and the free admission campaign for elementary and junior high school students do not apply.
*Preschoolers (under 2 years old) who receive the free Spoccha Pack are not eligible for promotional gifts.
*Since the Saikaya Yokosuka location is a Mini Spoccha, only the 3-hour packs (1,200 yen–2,290 yen) are available.
*For billiards and darts : If one person uses a single machine, an additional 200 yen is required only on Saturdays, Sundays, and holidays from 12:00 PM until closing.
*At locations without a drink bar, drinks are offered at a price reduced by 260 yen from the listed amount.
*Since the Chofu Ekimae and Machida Giorna locations are crane game parks, collaboration packs are not available.

Phantom Theta “ROUND1 Collaboration Campaign” Karaoke Collaboration Room

The collaboration room is available exclusively at the Kichijoji branch in Tokyo, where the entire room is themed after Phantom Theta. This room is also eligible for the B4 visual mat giveaway.

*Reservations are generally required. Only for use between 12:00 AM and 5:40 AM, you may use the facility for up to 5 hours and 40 minutes until 5:40 AM.
* A minimum of one order per person is required. Club member discounts and the free admission campaign for elementary and junior high school students do not apply.
*Special collaboration rooms are generally reservation-only; while they may be available during times without a reservation, use is limited until the next reserved time slot begins.

Phantom Theta “ROUND1 Collaboration Campaign” Karaoke Singing Campaign

A singing campaign is being held where you can sing designated songs to enter a raffle. Three winners will be selected at random from registered participants to receive an original-design microphone.

*Prizes are limited to Round One app users.

Phantom Theta “ROUND1 Collaboration Campaign” Bowling Event

For bowling, a score registration campaign is being held where you can receive an A5 clear file if your total score over two games meets the required threshold. The threshold is 170 points or more for men and 140 points or more for women.

*You may participate once per use of the Collaboration 2-Game Pack, and you are eligible for only one Total Score Achievement Prize.
* There is no limit to the number of times you can participate using the Collaboration Unlimited Throws Pack, but you can receive only one total score achievement prize.
* You can enter the competition by pressing the “Free Time Competition” button on the bench monitor. If you wish to participate, please let a staff member know.
* You cannot choose the type of clear file. The promotion ends when supplies run out.

Additionally, the post-pitch animation screen can be switched to the Phantom Theta style. This applies to eight patterns: turkey, double, strike, spare, one-pin left, split, gutter, and miss.

*To configure this setting, go to the tablet’s home screen and select “Score” → “Collab Effects” → “Phantom Theta” in that order.

Phantom Theta “ROUND1 Collaboration Campaign” Amusement Promotions and Capsule Toys

The amusement corner is available at all locations. If you play the participating crane games by inserting 500 yen or more consecutively, you’ll receive an A5 clear file as a special bonus. Collaboration prizes for the crane games are scheduled to be available in October.

*To receive the experience bonus, you must inform a staff member in advance that you wish to participate.
*You cannot choose the type of clear file. Offer ends when supplies run out.

Original pin badges are available in capsule toy machines for 400 yen (tax included) per play. There are 6 varieties in total, each approximately 54 mm in diameter, and sales are limited to 8 stores.

*At the Chikusa Store, sales will take place during the collaboration booth’s operating hours, from 9:00 AM to 11:59 PM.
*Sales will end once stock runs out.

Phantom Theta “ROUND1 Collaboration Campaign” Social Media Follow & Repost Campaign

A giveaway campaign where you can enter by following and reposting on X will be held in two separate rounds. Three winners in each round will receive a complete set of promotional items.

* Details are available on the official Round One LIVE X account (@round1_fanevent).

Frequently Asked Questions Regarding the Phantom Theta “ROUND1 Collaboration Campaign”

What are the campaign dates and participating locations?

From 10:00 AM on September 14, 2026, through December 13, all Round One locations are participating. However, the sale of collaboration menu items, capsule toys, and collaboration rooms is limited to select stores.

Where can I order the collaboration drinks?

The collaboration drinks are available at 93 locations offering bowling, karaoke, darts, and billiards, priced at 850 yen each. The Aomori, Omiya, Musashimurayama, Chikusa, Moriguchi, Chofu Ekimae, and Machida Giorna locations do not offer the collaboration menu.

How do I get the promotional items?

You’ll receive one item for every order of a collaboration drink, collaboration food item, customized drink, or popcorn. During the first half of the event, you’ll receive one of six types of stand-up coasters; during the second half, you’ll receive one of six types of square acrylic keychains. You cannot choose the specific design.

Which stores have the collaboration room?

Only one store: the Kichijoji branch in Tokyo. Reservations are required and can be made via the website or app. You’ll receive one B4-sized visual mat upon use.

What are the challenge songs for the karaoke campaign?

The three songs are “Horror Queen,” “Nothing but Bots,” and “Thrill.” Three subscribers will be randomly selected to win an original-design microphone. Participation is free, and you can participate up to twice per person per day.

{
“@context”: “https://schema.org”,
“@type”: “FAQPage”,
“mainEntity”: [
{
“@type”: “Question”,
“name”: “What are the event dates and participating locations?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “From 10:00 AM on September 14, 2026, through December 13, 2026, at all Round One locations. However, the sale of collaboration menu items, capsule toys, and collaboration rooms are available only at select locations.”
}
},
{
“@type”: “Question”,
“name”: “Where can I order the collaboration drinks?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “The promotion is available at 93 locations offering bowling, karaoke, darts, and billiards, priced at 850 yen each. The Aomori, Omiya, Musashimurayama, Chikusa, Moriguchi, Chofu Ekimae, and Machida Giorna do not offer the collaboration menu.”
}
},
{
“@type”: “Question”,
“name”: “How do I get the promotional items?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “You’ll receive one promotional item for every order of one of the following: a collaboration drink, collaboration food item, custom drink, or popcorn. During the first half of the campaign, you’ll receive one of six types of stand-up coasters; during the second half, you’ll receive one of six types of square acrylic keychains. You cannot choose the specific type.”
}
},
{
“@type”: “Question”,
“name”: “Which stores have the collaboration rooms?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Only at the Kichijoji location in Tokyo. Reservations are required and can be made via the website or app. You’ll receive one B4-sized visual mat with your visit.”
}
},
{
“@type”: “Question”,
“name”: “What are the required songs for the karaoke singing campaign?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “The three songs are ‘Horror Queen,’ ‘Nothing but Bots,’ and ‘Shivers.’ Three registered users will be randomly selected to win an original-design microphone. Participation is free, and each person can participate up to twice a day.”
}
}
] }

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

© ROUND ONE JAPAN Corporation