Stayed here for over a month and Koichi was the most responsive host I ever had. He is friendly and efficient, and I never had trouble. Here are some pros and cons about his place.
Pros
1. Super convenient. Literally around the corner from the station (which is on a dedicated line that goes from Ikebukuro).
2. Every shop you can think of. A supermarket right downstairs, nothing less than two pharmacies, a convenience store and lovely eclectic range of restaurants.
3. Room is clean and the space is nicely decorated. Rice cooker, gas hob and washing machine very convenient.
Cons
1. No lift. So if you are on one of the upper floors please be mindful if you have heavy luggage. The place is also just comfortable enough for two people.
2. The heating/cooling unit was a bit dusty.
3. Only one set of bed sheets and linens provided. I think if you are staying more than a month, at least an extra bed sheet and pillow case would be nice.
All in all, loved my stay! Thank you!