Absolutely perfect accommodation.
We visited Kenji's place for a piece of our honeymoon, and everything was perfect. The place was sparkling clean, had every amenity you could want, very cosy, awesome bathroom and shower, and excellent washer/dryer. Kenji was wonderful - he picked us up from the station, left very kind touches to celebrate our honeymoon, and provided lots of local guidance.
Western tourists (like us) - please do not be concerned about these types of beds! It was our first experience with them. They are SO SO comfortable. It's a pillow top, over a mattress, on comfortable flooring - they are long and wide, perfect for tall folks and couples. These were the best beds of our entire trip in dozens of AirBNBs. Truly - the BEST. Big comfy comforter over top as well.
Finally, the location is great. It's a 7 minute walk to the subway which goes straight to Shinjuku in 15 minutes, or to Takadanobaba where you can switch for many other trains. The local train system in Japan is the best in the world. Nishitokyo/Tanashi was perfect. Also lots of good food and groceries nearby when you're not downtown.
Thank you Kenji. I HIGHLY recommend this place! We were sad to leave.