A collaboration between “100 Girlfriends Who Love You So, So, So, So Much” and Oshiage Onsen Daikokuyu has been announced!
From Friday, September 4, 2026, through Sunday, September 13, 2026, original medicinal baths inspired by the characters and collaboration merchandise featuring newly drawn illustrations will be available.

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Details of the collaboration between “100 Girlfriends Who Love You So, So, So, So Much” and “Oshiage Onsen Daikokuyu”

A collaboration between the TV anime “100 Girlfriends Who Love You So, So, So, So Much” and the public bath “Oshiage Onsen Daikokuyu” in Sumida Ward, Tokyo, will take place from Friday, September 4, 2026, through Sunday, September 13, 2026.
The event will feature original medicinal baths inspired by Shizuka, Nagino, Ikumi, Momiji, and Yaku, as well as the sale of collaboration merchandise featuring newly drawn illustrations. Additionally, there will be exclusive events available only during the collaboration period, including “100 Girlfriends”-themed in-store decorations, special collaboration food and drinks, and the distribution of bonus coasters.

Original Medicinal Baths from the “I Love You So, So, So, So Much” Collaboration with “Oshiage Onsen Daikokuyu”

During the collaboration period, original medicinal baths inspired by the five characters—Shizuka, Nagino, Ikumi, Momiji, and Yaku—will be available. This event lets you enjoy the world of the series while soaking in baths themed after each character.
The schedule detailing which medicinal baths will be available and when is scheduled to be announced at a later date.

*The medicinal bath schedule will be announced at a later date.

Collaboration Food and Drinks for “100 Girlfriends Who Love You So, So, So, So Much” × “Oshiage Onsen Daikokuyu”

During the collaboration period, collaboration food and drinks will be served at “Kogane Kitchen” on the second floor of our sister facility, Kogane-yu. Special commemorative coasters are also scheduled to be distributed.
The menu for the collaboration food and drinks will be announced at a later date.

*The menu for the collaboration food and drinks will be announced at a later date.
*Kogane Kitchen is located separately from Oshiage Onsen Daikokuyu (2nd floor of Kogane-yu / 4-14-6 Taihei, Sumida Ward, Tokyo).

“100 Girlfriends Who Love You So, So, So, So Much”: “Oshiage Onsen Daikokuyu” Collaboration Merchandise

A total of 8 types of collaboration merchandise featuring original illustrations will be available. In addition to the “Bath Ticket with Clear File” set (which includes a bath ticket and a clear file), items such as collectible pin badges, acrylic stands, and scarf towels will also be available.

*The “Bath Ticket with Clear File” set includes 1 bath ticket (1 design) + 1 original clear file.
*Product images are for illustrative purposes only. Actual products may differ.

Merchandise Sales Hours

*Sales are not available late at night or early in the morning.
*Cash only for both bathing and merchandise purchases.
*Sold-out announcements will be posted on Daikokuyu’s official X account.

Merchandise Purchase Limits

The following purchase restrictions will be in effect during this period.

*Returns and exchanges are not accepted except for defective items.
*Please confirm any quantity increases or post-payment options must be confirmed at the time of purchase.

Purchase Bonus for the “100 Girlfriends Who Love You So, So, So, So Much” × “Oshiage Onsen Daikokuyu” Collaboration

For every 2,000 yen (tax included) spent on “100 Girlfriends Who Love You So, So, So, So Much” × “Daikokuyu” merchandise, you’ll receive one randomly selected postcard from a set of five as a purchase bonus.
The lineup includes five designs: SHIZUKA, NANO, IKU, MOMIJI, and YAKU.

* You cannot choose the artwork.
*This promotion will end once all bonuses are gone. Depending on when you make your purchase, the promotion may have already ended.

Event Information for the “100 Girlfriends Who Love You So, So, So, So Much” x “Oshiage Onsen Daikokuyu” Collaboration

The venue is the public bath “Oshiage Onsen Daikokuyu” in Sumida Ward, Tokyo. It’s a 10-minute walk from Tokyo Skytree and a 6-minute walk from Oshiage Station.

*Since Daikoku-yu is closed on Tuesdays, it may be closed on September 8 (Tue). Please check the official website or official X account for operating hours before visiting.
*The above notes are subject to change on the day of your visit.

The “100 Girlfriends Who Love You So, So, So, So Much” x “Oshiage Onsen Daikoku-yu” collaboration begins September 4!

This collaboration features a lineup of limited-time offerings, including original medicinal baths inspired by the characters, merchandise featuring newly drawn illustrations, in-store decorations, and collaboration food and drinks. The event will run for 10 days, from Friday, September 4, 2026, to Sunday, September 13, 2026.

Frequently Asked Questions About the “100 Girlfriends Who Love You So, So, So, So Much” x “Oshiage Onsen Daikokuyu” Collaboration

When does the collaboration run?

It runs from Friday, September 4, 2026, to Sunday, September 13, 2026.

Where is the venue?

It’s at Oshiage Onsen Daikokuyu in Sumida Ward, Tokyo (3-12-14 Yokogawa, Sumida Ward, Tokyo). It’s a 10-minute walk from Tokyo Skytree and a 6-minute walk from Oshiage Station.

What are the original medicinal baths like?

Original medicinal baths inspired by the five characters—Shizuka, Nagino, Ikumi, Momiji, and Yaku—will be available. The schedule for the medicinal baths will be announced at a later date.

When can I buy merchandise?

Weekdays: 3:00 PM – 11:00 PM; Saturdays: 2:00 PM – 11:00 PM; Sundays and holidays: 1:00 PM – 11:00 PM. We do not sell merchandise late at night or early in the morning.

Can I use a credit card for payment?

No, you cannot. Payment for baths and merchandise is cash only.

Are there any purchase limits on merchandise?

Up to 3 items per transaction (different character designs count as separate items), and a limit of 15 trading items.

Are there any purchase bonuses?

For every 2,000 yen (tax included) spent on collaboration merchandise, you will receive one random postcard from a set of five designs. Designs cannot be selected, and this offer ends when supplies run out.

Where can I enjoy the collaboration food and drinks?

They are served at “Kogane Kitchen” on the 2nd floor of our sister facility, Kogane-yu. The menu will be announced at a later date.

How much is the bath admission fee?

Adults: 600 yen; Junior high school students: 500 yen; Elementary school students: 200 yen; Preschoolers: 100 yen.

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Please check the official website for details.
*Please note that the information in these articles may be outdated, so please check the official website for the latest details.

© Rikuto Nakamura, Yukiko Nozawa / Shueisha, “I Love You So, So, So, So Much” Production Committee