Ryusenji no Yu, operated by Oakland Kanko Development Co., Ltd. (Location: Kasugai City, Aichi Prefecture; President: Akiko Matsunaga), is holding collaboration events with Ahiru Taicho at all 8 locations from November 26, 2025 (Wednesday) to September 26, 2026 (Saturday).
This event features a collaboration with Ahiru Taicho, a character long beloved as a bath accessory. The special program includes limited collaboration merchandise sales, collaboration drinks, photo sessions with Ahiru Taicho, and decorations with Ahiru Taicho floating in the bathtubs - offering enjoyable experiences for families and adults alike.
The project commemorates 2026, where the numbers "26" evoke the word "furo" (bath) in Japanese. Events are held on the 26th of each month, a date that has become known as "Bath Day."
Each event date will feature photo sessions with Ahiru Taicho and sales of limited collaboration merchandise.
Event Schedule
November 26, 2025 (Wednesday) Spa Mettsa Ōtaka (Completed)
January 26, 2026 (Monday) Yokohama Spa Hills (Completed)
February 6, 2026 (Friday) Spa Mettsa Sendai
March 26, 2026 (Thursday) Nagoya Moriyama Main Store
April 26, 2026 (Sunday) Hachioji Minamino Store
June 26, 2026 (Friday) Toyota Josui Store
July 26, 2026 (Sunday) Soka Yatsuka Store
September 26, 2026 (Saturday) Shonan RESORT SPA
About Ahiru Taicho
Ahiru Taicho is a well-known character from Pilot Corporation's (Headquarters: Kyobashi, Chuo-ku, Tokyo; President: Fumio Fujisaki) bath accessory line. Trademarked and commercialized as "Ahiru Taicho" in 2001, the character celebrated its 25th anniversary in 2026 and continues to be cherished across generations. Beyond product development and various collaborations, Ahiru Taicho has participated in social initiatives, serving as the "Kirishima Onsen Ambassador" for Kirishima City, Kagoshima Prefecture since 2014, and as the Ministry of the Environment's "Tsunageyou, Sasaeyou Mori Sato Kawa Umi Ambassador" since 2015.
About Ryusenji no Yu
Ryusenji no Yu is a hot spring facility brand that opened Japan's first establishment named "Super Sento" in Ryusenji, Moriyama Ward, Nagoya City, Aichi Prefecture in 1989, establishing the prototype for today's super sento business model.
In 2000, recognizing the health benefits of artificial carbonated springs, the brand became the first in Japan to introduce carbonated baths to all directly operated stores, pioneering what later became the carbonated bath boom.
Currently operating 8 locations across Japan: 1 in the Tohoku region, 5 in the Kanto region, and 2 in Aichi Prefecture.
At "SAUNACHELIN," an awards program recognizing innovative sauna facilities nationwide, "Spa Mettsa Ōtaka" ranked first nationally in 2022, and "Spa Mettsa Sendai Ryusenji no Yu" ranked fourth nationally in 2023. Looking ahead, "Sauna Mettsa Oimachi Tracks," an urban premium wellness spa, is scheduled to open on March 28, 2026, within "OIMACHI TRACKS," a mixed-use facility adjacent to JR Oimachi Station.
