My group is 8 pax and Spring allowed us to drop the luggage at 11 am and check out at 11 am too. (It's a lovely welcome for us). Location of airbnb is great very close to station. The instruction of check-in and way to the house is clear and easy to understand.
This house has a big living room with the kitchen (quite spacious) which full of equipment for cooking and sharing good time together. All rooms have heater which are working well.
We had a good time here and definitely we will come back again. I do recommend this house to all big group who requires the spacious house which is not easy to find in Tokyo.