Time Out says
While other onsen in Tokyo are inclined to be conservative with their precious hot spring water, that isn't the case at this dowdy public bath in Sasazuka, just one stop down the line from Shinjuku. At Sakaeyu, even the taps and showers dispense pure onsen water – a generous profligacy that goes some way to compensating for the cramped dinginess of the place. The facilities include a medicinal bath – which might be imbued with lavender, wine, green tea or herbs, depending on which day you visit – and a sauna, the ¥850 premium for which includes a free bath- and face towel rental.
2-9-5 Sasazuka, Shibuya-ku
|Transport:||Sasazuka Station (Keio, Keio New lines)|
|Price:||Adults ¥460, junior high students ¥300, elementary school students ¥180,|
|Opening hours:||3pm-1.30am, 1st and 3rd Sun of the month 1pm-12midnight, 2nd, 4th and 5th 3pm-12midnight, closed Wed and 3rd Thu of the month|