Hot springs are everywhere in Japan, as said by Jack Seward, "Japan has 13,300 hot springs, of which 1,400 have mineral properties that are of medicinal value" [43]. Over time the Japanese realized the benefits of hot springs, whether it is financial or health benefits. They found out that there is a certain amount of time in which someone can stay in the hot spring, which is about four minutes. They have/had (don't know if they still do) professional people to lead all the visitors into the hot spring and when it came to four minutes for everyone being in the water, they would blow a whistle to let the people know their time was up. If the people stayed in any longer than the whistle their skin would have been burned. Some of the hot spring businesses have been around for a long time which tells us that the owners know everything there is to know about hot springs. Their hot springs, in certain areas, are uni-sex and have multiple people in the same hot spring. They know there is a time and a place for someone to be naked and the hot springs is one of them, so as a common courtesy, they tend to look the other way as a person is getting in the water. In the 1860's Ensign McCauly tried to ban "uni-sex" bathing (known back then as mixed bathing), but people kept resisting that were not in the areas where it was already banned, so in numerous areas now you can still use uni-sex hot springs.