The healing qualities of hot springs are well known; it is ridiculous that we didn't realize their full potential earlier, despite sitting on a literal treasure trove of hot, healthy, glowing sludge! Add to this an almost equally healthy, mind-liberating atmosphere of Sectoweed fumes, and we have a facility which not only improves recovery rate of everyone in the Hideout by 0.5% of their max HP daily, and Refreshment rate to 10, but also serves as a cultural center! They say you shouldn't play or swim in the Onsen, but we're no dumb Sky Ninjas and can also use the Onsen as a small training center (up to 6 Hands).