Koichi is a very attentative host and was very sweet to us. He emailed me with clear instructions to find the place and is always happy to take questions from us. Koichi's place is just as the images show: clean and tidy. But it is surprisingly spacious. We had a company of 4 but it would easily fit 6 with luggages. Our area was close to shinjuku and it was always interesting to walk through the streets and experience the night life of Japan.