Onsen composition
Before bathing in an onsen, be sure to check the onsen composition chart hanging in the changing area or other locations.
| Name of source spring | |
|---|---|
| Effects | Upon bathing in this onsen you can expect improvements for these symptoms. ■Selecting an onsen (hot spring) according to your condition (PDF, 176 KB) |
| Prohibited diseases | People with these symptoms or diseases are not allowed to bathe in this onsen. ■Things to keep in mind |
| Notes on bathing duration | Cautions about the duration and frequency of bathing in this onsen will be written here. Pay particular attention to the length of time for medicinal bathing. ■How to bathe in an onsen |
| Composition | |
|---|---|
| Onsen type | Based on their composition, medicinal springs are divided into nine different categories. ■What types of onsen have you tried? |
| pH level | Classification according to hydrogen ion concentration. Water with mild alkalinity has the effect of making skin smooth.※ |
| There is also a place where the content of regulated components will be listed in detail. ※Classification according to pH pH of under 3 (acidic) / pH from 3 to 6 (mildly acidic) / pH from 6 to 7.5 (neutral) / pH from 7.5 to 8.5 (mildly alkaline) / ph above 8.5 (alkaline) |
|
Note
As a result of a 2005 partial revision to the Hot Spring Law, it has also become obligatory to make clear the following points.
- 1.
If water is added to an onsen which is then provided for public bathing, this fact as well as the reason for the action must be made clear.
- 2.
If onsen water has been heated and provided for public bathing, this fact as well as the reason for the action must be made clear.
- 3.
If onsen water has been circulated and provided for public bathing, this fact (including whether or not a filter is being used) as well as the reason for the action must be made clear.
- 4.
If bath additives have been added to onsen water, or if onsen water has been sterilized, and provided for public bathing, the name of the bath additives and the sterilization process must be made clear along with the reason for the action.