Had a pleasant stay at Kainoa Guest House. All the amenities you needed were there and the place was designed very intuitively and in a user-friendly manner (eg. Sufficient hangers, racks, storage space, many power outlets with USB connection). The hosts Yuko and Nick were also very responsive and helpful too, kindly offered to store our luggage when we arrived in Tokyo early prior to the check in time. Would stay again if back in Tokyo!