Chain onsen in Chofu popular with locals. Pretty standard in all respects—a variety of baths indoors and a few smaller outdoor tubs. The salt bowl in the steam is a nice touch, but nothing to get too excited about. Unless you live close perhaps not worth the journey—there are better onsen in Tokyo in the sub-¥1,000 price range.
Sengawa Yukemuri no Sato is a day onsen near Chofu. It’s a very typical family-orientated onsen with a good mix of baths tubs, a restaurant serving ramen and other dinner sets for ¥800-900, and other services such as a massage room and barber shop.
Students chatting and young children with their parents, coupled with the relatively small area of the baths, means that Yukemuri no Sato feels busy, and isn’t the best choice if you’re looking to relax. The baths are pretty standard for the family onsen (jazz baths, water massage chairs, and so on), but one unique point was the steam room: an 8-person room with a bowl in the middle from which you can take a handful of salt and rub it over your body, presumably to help bring out the sweat and let you detox quicker.