The “Azur Lane” public bath collaboration, “Azuren Sento,” will be held sequentially starting November 14, 2026, at Tatsumi Onsen in Osaka; November 21 at Waon no Yu in Ishikawa; and November 28 at Daikoku-yu in Tokyo, and and will run through December 21. In addition to merchandise featuring newly drawn illustrations of the characters in yukata, bath tickets that come with tenugui towels, and the collaboration baths themselves, each facility will offer its own unique events, such as a collaboration room at Tatsumi Onsen, an entrance curtain designed by Hirakiya at Waon no Yu, and a special event at Daikoku-yu.