Koichi's place is extremely central to Shinjuku and is about a 10-15 min walk to Shinjuku JR station.
The apartment itself was very clean and contained everything you could want. It has the added bonus of having a washing machine and balcony to dry clothes.
Koichi's communication was fantastic, he even came to greet us when we had checked in!
If you're looking for somewhere with value for money and in a central Tokyo location I would highly recommend. Shinjuku is a fantastic spot to stay as it has great transport links and is near to most tourist hotspots.
We had a great time!! Thanks Koichi!!