The collaboration between Yostar, Inc.’s popular smartphone game “Azur Lane,” which features anthropomorphized warships, and a traditional public bathhouse is celebrating its 5th anniversary, and it has been confirmed that the collaboration will take place again this year at Tatsumi Onsen in Nagai, Osaka.
As a special event, applications are being accepted until October 16, 2026, for a participatory program that allows fans to display their favorite character on mirror advertisements inside the bathhouse.
・Azur Lane-themed decorations and original merchandise are scheduled to be available
・As a special event, participants are being recruited to display mirror advertisements featuring their favorite characters
・The application period runs from October 2 to October 16, 2026, and the participation fee is 20,000 yen (tax included)
・Participants will receive an “original plate” as a commemorative gift
Azur Lane × Tatsumi Onsen “5th Anniversary Public Bath Collaboration” Event Overview
The “Azur Lane” public bath collaboration, which began in 2022, is celebrating its 5th anniversary, and this year’s collaboration will once again take place at “Tatsumi Onsen,” an all-night public bath in Nagai, Osaka. Azur Lane-themed decorations and original merchandise are scheduled to be available, with details to be announced at a later date.
| Event Name | Azur Lane × Sento Collaboration 5th Anniversary (Part 5) |
|---|---|
| Venue | Tatsumi Onsen (Osaka, Nagai) |
| Event Period | November–December 2026 (Details to be announced later) |
| Event Details | Azur Lane-themed Decorations Sales of Original Merchandise Mirror Advertisement Campaign |
| Official Website | Tatsumi Onsen Announcements |
| Official X | @tatsumionsen |
Azur Lane × Tatsumi Onsen “5th Anniversary of the Public Bath Collaboration” Mirror Ad Participation Event
As a special 5th-anniversary event, a participatory campaign is being held where you can feature your favorite character on mirror advertisements inside public bathhouses. Choose your favorite character from the 50 characters that have appeared in past public bathhouse collaborations, and share what makes them special by adding a design template and a comment.
There are 10 characters for the fifth installment in 2026, and you can check the lineup of past characters at list published by Tatsumi Onsen .
| Display Locations | Tatsumi Onsen Men’s and Women’s Baths (33 slots total) |
|---|---|
| Display Period | During the collaboration period from November to December |
| Application Period | October 2, 2026 – October 16, 2026 |
| Notification of Results | Only winners will be notified via email by October 20, 2026 |
| Payment Deadline | October 26, 2026 |
| Participation Fee | 20,000 yen (tax included) |
| Souvenir | Original commemorative plate (mailed) |
| How to Apply | Application Form |
| 1 | Fill out the required information on the dedicated form to apply |
|---|---|
| 2 | Select your favorite character and a design template, then enter your Commander Name, social media ID (optional), and a comment (recommended to be 20 full-width characters or fewer) |
| 3 | Pay the participation fee by the deadline |
| 4 | Your entry will be displayed as a mirror ad during the collaboration period from November to December |
| 5 | The commemorative “Original Plate” will be mailed to you in order |
*If the number of entries exceeds the available slots, a random drawing will be held.
*Entries containing discriminatory content or content deemed inappropriate by Yostar and Tatsumi Onsen—such as material that violates public order and morals—will be disqualified.
*We will not respond to inquiries regarding the selection process or the lottery.
*There are multiple design options for the mirror advertisement and the original plate.
Azur Lane × Tatsumi Onsen “5th Anniversary Public Bath Collaboration” Venue
The venue, Tatsumi Onsen, is a public bath located in Nagai, Osaka, that is open all night.
| Venue | Tatsumi Onsen |
|---|---|
| Address | 5-10-11 Ōryō, Sumiyoshi-ku, Osaka City, Osaka 558-0001 |
| Official Website | Tatsumi Onsen Official Website |
Azur Lane × Tatsumi Onsen “5th Anniversary Public Bath Collaboration” FAQ
When is the application period for the mirror advertisement?
October 2–16, 2026. If the number of applications exceeds the available slots, a lottery will be held, and only winners will be notified by email by October 20.
How much is the participation fee?
20,000 yen (tax included); the payment deadline is October 26. Participants will receive an “original commemorative plate” by mail.
When will the mirror advertisements be displayed?
They will be displayed in the men’s and women’s baths at Tatsumi Onsen (33 spots total) during the collaboration period from November through December.
What are the details of the collaboration?
Azur Lane-themed decorations and original merchandise are planned for sale; details will be announced at a later date.
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Please check the official website for details.
*Please note that the information in these articles may be outdated; we kindly ask that you verify the details on the official website.
© 2017 Manjuu & YongShi © 2017 Yostar
