Which Kusatsu Ryokan Has Kakenagashi? Compare Baths, Not Hotel Slogans
Check which Kusatsu ryokan baths are documented as kakenagashi; natural spring water alone does not mean a bath continuously flows.
Kakenagashi means spring water flows into and out of a bath. A natural-spring bath is not automatically kakenagashi: an inn can fill a tub on demand or manage public, private and guest-room baths differently.
What the current property information supports
Eidaya is the clearest choice if you want an explicit flow statement. Its official hot-spring page says the inn uses Bandai spring as kakenagashi, with “nothing added and nothing taken away.” It also says the private baths are free for guests. In-room hot-spring baths are limited to designated room types; a regular bathroom does not become an onsen just because it is in the same building.
Tokinoniwa has natural spring water in every guest room, but those room baths are not kakenagashi. The official FAQ says they use Yukawa spring and are filled by the guest using a room control. The property also has shared baths and three private outdoor baths, but the information available does not justify applying one flow method to every tub.
Kusatsu Hotel 1913 uses two sources in its shared bathing facilities: Sainokawara and Bandai. It has three private baths, and some room types are marked as having an onsen. The property’s current pages do not specify the flow method for every public, private and in-room bath. That means its double-source offering is real, but the full inn should not be labelled kakenagashi without more specific confirmation.
| Inn | What is confirmed | What not to assume |
|---|---|---|
| Eidaya | Bandai spring described as kakenagashi; free private baths | Every room has an in-room onsen—only selected types do |
| Tokinoniwa | Natural Yukawa spring bath in every room | The in-room bath is continuously flowing; the inn says it is filled on demand |
| Kusatsu Hotel 1913 | Two source waters in the shared baths; selected rooms marked “onsen attached” | Every tub uses the same source or flow method |
Eidaya is the only clear match if you specifically want documented kakenagashi. Its private baths are free for guests, but only selected room types have an in-room spring bath; the renovated Simple Modern rooms have a regular bathroom. Some routes between rooms, reception and baths include stairs.
Tokinoniwa fits a different priority: all 64 rooms have a private outdoor bath supplied by Yukawa spring, filled on demand rather than continuously flowing. Guests also have access to shared baths using Yukawa and Wata-no-yu, plus three free private outdoor baths when vacant. Tattoo access is governed by separate public-bath rules.
Kusatsu Hotel 1913 combines Sainokawara and Bandai-kō in its public baths. Selected room categories include an onsen, and three private baths can be booked for 45-minute sessions after check-in. The hotel has no elevator.
Sainokawara’s 49.3°C / pH 2.08 and Bandai-kō’s roughly 95°C / pH 1.70 are source measurements, not readings from the hotel’s tubs. The flow method for each Hotel 1913 bath is unconfirmed; ask the inn before booking if that detail is essential.
Verify the bath you plan to use
For a specific room or bath, check its spring and whether the inn describes it as kakenagashi. Source temperature is not bath temperature, and Hotel 1913 has not published a flow method for each bath.
If your priority is a private bath in the room rather than the flow method, the Kusatsu room-upgrade guide compares which room categories add that feature. For a wider stay decision, use the Kusatsu ryokan guide.
Sources
- [Eidaya: hot springs and private baths](https://www.eidaya.com/spa/) - [Eidaya: room types](https://www.eidaya.com/rooms/) - [Tokinoniwa: room baths](https://dormy-hotels.com/resort/hotels/tokinoniwa/rooms/) - [Tokinoniwa: FAQ on room-bath operation](https://dormy-hotels.com/resort/hotels/tokinoniwa/faq/) - [Kusatsu Hotel 1913: hot springs](https://www.kusatsuhotel.com/hot_spring) - [Kusatsu Hotel 1913: room types](https://www.kusatsuhotel.com/room) - [Kusatsu Town: hot-spring information](https://www.town.kusatsu.gunma.jp/www/contents/1485254967207/) - Images: [Eidaya room](https://eidaya.com/), [Hotel 1913 bath](https://www.trip.com/)Checked: September 27, 2026
Tags: Kusatsu Onsen, kakenagashi, natural hot spring, ryokan comparison, private bath
