Yuichi is a great person. I asked him to check in a little bit earlier because me and my friends were really tired and we needed to rest a bit and we have no problems to enter the property a little bit earlier.
The house was really really close the the station and only 15 minutes from Shinjuku with the JR train.
Everything was clean (however we had to change the sheets because they were used - I found clean sheets in the wardrobe-).
The only thing I would like to add is that maybe the house is too small for 4 people with 4 luggages.
Thank you Yuichi.