Great stay at Min's guesthouse. He's super nice, very responsive and makes you feel at home. The place is very clean, heaters in the room and shared toilets (one downstairs one upstairs) and shared shower room. Common area is great for cooking or socializing with other guests. Very Japanese style house with pretty much no furniture in the room and thin futon on the floor. I found it comfortable. Very minimalist which is what you should probably expect in Japan. Location is great, only 10-20 mins to main Shinjuku area. Few minutes to subway. Grocery stores nearby within few minutes. Overall great stay, lots of fun and interesting people to meet.