Capybaras are attracted to onsen (hot springs) for various reasons, including thermoregulation as they enjoy soaking in water to regulate their body temperature, especially in colder climates. The warm environment of onsen offers relaxation and social bonding opportunities for these social animals, mimicking their natural tendency to gather in groups. Some believe that the minerals and heat in the hot spring water may provide health benefits for capybaras, offering soothing effects and potential relief from muscle aches. Additionally, the mineral-rich water in onsen can be beneficial for their skin health, contributing to their overall well-being. In places like Japan, where capybaras have become popular tourist attractions, their affinity for onsen has added to their charm, creating a unique and heartwarming spectacle for visitors and locals alike.