Masami's place is conveniently located to Hatagaya station. It will be a bit cramped and without privacy for larger groups, but definitely manageable. The amenities are decent. If we hadn't each got our own SIM cards, the provided 500mb/day internet might have been a problem. The beds were fitted expecting us to share, even if there were beds available, but this also frees up the couches. Lots of late night food, drinks, convenience stores, all available nearby.