According to legend, onsen hot springs are sacred places where people can come to cure their injuries and diseases. Some still believe in this but nowadays, people see them as a place to unwind, and hopefully soften and lighten their skin. Thermae Yu, which is just two minutes’ walk from the Shinjuku-Sanchome metro station, serves its purpose as a health and beauty spa complex. What makes this gigantic bathhouse complex authentic is that they transport natural hot spring water every day from Nakaizu, known to be one of the most popular onsen towns in Japan. They are also equipped with several saunas, spacious communal lounges, relaxation salons and eateries.