
Guide
Ikaho Insenjo
7 min readOverview & Charm
Ikaho Insenjo is a unique facility in Ikaho Onsen, Gunma Prefecture, where you can directly drink the hot spring's source water. Ikaho Onsen has a prestigious history; in the early Meiji era, it received guidance for medicinal hot spring therapy from Dr. Berthelot, often referred to as the 'Father of Japanese Onsen Medicine.' At this site, anyone can easily experience the taste of the 'Kogane-no-yu' (Golden Spring), the iconic symbol of Ikaho.
History & Cultural Background
The history of Ikaho Onsen is ancient, and its value has long been recognized from a medicinal perspective. The drinking station (Insenjo) is strategically located on the path between Ikaho Shrine and the Ikaho Rotenburo, serving as a place to feel the blessings of the hot spring up close. The culture of incorporating the mineral-rich spring water into one's body is a long-standing tradition that continues to be practiced today.

Key Highlights
Here, you can taste the famous 'Kogane-no-yu' directly. The facility is located near a Suikinkutsu (water zither), allowing visitors to enjoy the soothing sounds of water alongside the natural bounty of the spring. The surrounding area is also dotted with historical sites such as Haruna Shrine and Mizusawa-dera Temple, allowing you to trace the local history alongside its famous hot spring culture.
Seasonal Recommendations
Since the Insenjo is located in an outdoor environment, the experience may vary depending on the seasonal temperature. When consuming the spring water, it is common practice to do so in moderation, paying attention to your physical condition and the surrounding temperature. Visiting as part of a daytime stroll allows you to enjoy the refreshing atmosphere of the hot spring town.
Experience & Etiquette
Drinking the hot spring water is a unique activity, but there are certain guidelines to follow for the best experience. Generally, it is suggested to drink between 100ml to 200ml per serving, with a total daily intake of 200ml to 1000ml. It is often recommended to drink the water 30 to 60 minutes before a meal. Being mindful of these traditional practices enhances the medicinal experience.
Surrounding Area
The Insenjo is perfectly positioned on the main sightseeing route of Ikaho. Nearby, you can find the iconic 365-step stone staircase, Ikaho Shrine, and the Suikinkutsu. The area also features cultural landmarks such as the Takehisa Yumeji Memorial Museum and the Hosaka Museum, offering a rich blend of hot spring culture and local history.
What to Bring & Manners
Please observe the following when drinking the spring water:
- Taking the spring water home for consumption is prohibited.
- Avoid consuming tea, coffee, or other beverages immediately after drinking the spring water.
- It is generally advised to avoid drinking the spring water right before bed or after dinner.
- If using the water for specific medicinal purposes, follow the guidance of a medical professional.
- While having a clean container or bottle is convenient, please remember that taking the water away from the site is not allowed.
- Regarding payments: While the drinking of the water itself is free, nearby facilities accept cash and credit cards.