Healing Springs is a Vintage Story mod by Cheeki. Healing Springs turns hot water into a slow healing source and lets you carry it in buckets for personal onsens.

Why this mod is worth installing
Useful for players who want hot springs to support recovery and need to move hot water when building a bath or onsen away from its source.
What Healing Springs adds
Standing in hot water gradually restores health: the default effect heals 0.1 HP every 1.5 seconds, or about 4 HP per minute. This makes a hot spring a recovery spot rather than only a decorative feature.
Hot water can be collected and transported in buckets, allowing players to create a private onsen or move the healing water closer to a settlement. The healing effect and its timing can be adjusted, or healing can be turned off while keeping bucket transport available.
Where to download Healing Springs
The official Vintage Story Mod DB page is the right place to get the current release through the in-game mod manager.