I booked only 1 night here through Japanican. This is an automated booking engine so despite having a receipt I felt a bit nervous about not having made contact with a real person - but no probs - the hotel was readily expecting us.
Yumura Spa is about 10 mins in a taxi (700Y ish) from Kofu JR station and is a little area of many onsen. People do don their yukatas and wooden sandles and walk around from bath to bath. there is also a short walk to through the nearby hills past ancient burial sites and shrines. Yamanashi prefecture is famous for the onsen, wine growing, crystals and senshokyo gorge (which is why we went.)
The hotel has a couple of staff with reasonable english - most have none - but it is not really a problem. A large tatami room with a main table/futon area, and a small table with hole under the table and a small sitting area and an outdoor terrace looking over the garden. There is a full mini bar, A/C, private bathroom and toilet, yukatas and slippers - and... more