The question is: Can a child of two to three years old take a bath in an onsen (hot spring)?
In general, most public hot springs or onsen prohibit children under the age of five from entering due to hygiene and safety concerns. Many onsen have signs indicating that they are not suitable for young children.
However, some private homes or vacation rentals may allow younger children to take a bath in their own hot tubs or showers if proper precautions are taken. It is also possible to install baby-friendly facilities like pool fencing, alarms, and water-level indicators at home.
In any case, it’s essential for parents and caregivers to supervise young children closely when they’re near water, especially in settings where there may be potential hazards.