What makes an onsen a kakenagashi onsen?
Firstly an onsen is:
- One that has been officially declared an onsen by Japanese onsen law
- Contains water flowing from a personally owned or shared hot spring.
- Firstly fresh water from the earth must continually flow into the bath.
- No other water can be added to the bath (other than officially recognized exceptions).
- Any overflowing water must not be reused.
- No filtered water can be used to compensate for a lack of hot water.
So with the above in mind a kakenagashi onsen must:
- Only use pure water as it springs from the earth without adding anything to it.
- Must fill the bath completely and overflow
According to our association it is okay to add water or heat to a hot spring in the following circumstances.
- Adding heat to cold mineral springs, or low heat springs in order to make it suitable for bathing.
- Adding water to a spring with very high mineral content in order make it suitable for bathing.
- Adding water to a high temperature spring in order to make it suitable for bathing (so that the fresh onsen water does not have to be held for a period of time to allow it to cool down).
* The amount of water added must not exceed 20% of the total water in the bath.
- No water can be added to compensate for a lack of water.
- Guidebook production.
- Association member recruitment.
- Running the “Gensen Smile Coupon” program in which you can accumulate points towards a free night’s stay.
- Running the “Gensen Supporter” membership system in which we provide events and bonuses.
- Organizing the Gensen Kakenagashi Summit an annual networking event for association members.
Conditions for joining our association
- A recommendation from two existing members.
- Fill in the oath form without any falsehoods.