Location is great. About 7-8 minute easy walk from both Kawasaki train stations, which means it is near food and shopping. There is also a cheap bus that will take you from Haneda (HND) airport for under Y300. It is on a quiet street. I couldn't hear any street noise.
Room is very small (typical of cheap business hotel), but there is a desk, AC works well, bathroom has a (small!) bath tub. Full bath amenities (shaving, toothbrush, face towel, shampoo,etc.)
Free breakfast is traditional Japanese business hotel fare (not much meat, but lots of hot/warm items)
The only fault I found was that the bed post was broken, so I couldn't lean on it. Doesn't affect me...