In Japan, the bath has a special status. And for Japanese, using one is an essential part of daily life. It's not just a place to wash yourself, but a chance to relax, reflect on your day, or spend time with your family. This time on Japanology Plus, our theme is bathrooms. Our guest is Osamu Oba, a professor at Kyoto Prefectural University. He explains why baths are so important in Japan, and introduces us to the latest innovations. And in Plus One, Matt Alt discovers how bath additives are created.