Ofuro Cafe Hakujyu no Yu and Hiranuma Suisan Collaborate! "Eel Dressing & Grilled Eel Free Distribution" Event to be Held on Sunday, July 19

Onsen Dojo Co., Ltd. (Tokigawa Town, Hiki District, Saitama Prefecture, CEO Kazuki Yamasaki), which operates the day-use hot spring "Ofuro Cafe Hakujyu no Yu" (Kamikawa Town, Kodama District, Saitama Prefecture, hereinafter referred to as Hakujyu no Yu), will hold an event featuring "eel dressing" and "free distribution of grilled eel" using domestically produced eels farmed on land in Kamisato Town, Saitama Prefecture on Sunday, July 19, 2026.

The eels provided this time were farmed at "Kamisato halk," a closed-system land-based eel farm. This facility was established in September 2022 by Hiranuma Suisan Co., Ltd. (Kamisato Town, Saitama Prefecture) with the desire to revive eel farming in Saitama Prefecture, and began its aquaculture business in Kamisato Town, Saitama Prefecture.

At "Tawaya," the restaurant at Hakujyu no Yu, we always offer menu items using eels from "Hiranuma Suisan." Please also enjoy these.

<Land-Based Farmed Eel Dressing & Grilled Eel Free Distribution>

Date: Sunday, July 19, 2026

Time: Dressing Session - 5:00 PM~, Free Grilled Eel Distribution - 6:00 PM~

Location: Restaurant Tawaya

<Collaboration Menu>

Stone-Grilled Hitsumabushi with Aged Brown Rice (R) and "Samurai Eel" - 2,980 yen

"Samurai Eel," carefully raised at the land-based farm "Hiranuma Suisan" in Kamisato Town, Saitama Prefecture. A luxurious dish combining the fragrant aroma of stone-grilling with the chewy texture of "Aged Brown Rice (R)."

Hiranuma Suisan Co., Ltd.

Hiranuma Suisan Co., Ltd. is a startup company established in September 2022. It is pursuing three challenges: improving Japan's future food self-sufficiency rate, passing on food safety and security to the next generation, and expanding land-based aquaculture technology overseas. They entered into a comprehensive cooperation agreement with Kamisato Town on May 12, 2023.

https://food.hiranumasuisan.co.jp/

Kamisato halk

The nickname "Kamisato halk" is derived from the initial letters of the facility's functions and roles: hydroponics, aquaculture, laboratory, and kitchen. The site area is 4230 square meters, the total floor area is 1114 square meters, and the tank capacity is 50 tons x 6 tanks, allowing for the farming of up to 90,000 eels. A restaurant attached to the farm opened in May 2025, and the "unaju" (eel bowl) made with freshly harvested, dressed, and grilled eels has been well-received.

Onsen and Fermentation Ofuro Cafe Hakujyu no Yu This day-use hot spring boasts natural hot spring water with high salinity, drawn from the Paleozoic strata 750 meters underground. We are also committed to culinary experiences, such as the monthly "Seafood Dressing Session" and the "Flowing Somen Terrace," which features Saitama Prefecture's first rotating somen machine. Enjoy a fun and comfortable day-trip to the hot springs with our lounge where you can relax even after your bath.

337-1 Wase, Kamikawa Town, Kodama District, Saitama Prefecture

https://ofurocafe-hakujyu.com/

ONDO Holdings Co., Ltd.

Under its umbrella are Onsen Dojo Co., Ltd., Kii Company Co., Ltd., Sakana to Co., Ltd., and Saitama Musashi Heat Bears Co., Ltd. We are working to create new value to "energize the region," contribute to regional revitalization, and foster human resources. https://ondoholdings.com/