I lived in a guest house in Nishi Kasai run by a company called Raise House. I lived there for 6 months and never saw ONE RAT OR COCKROACH. I don't know how they hell they did that, because even though the rooms were clean (individual and dormitory style rooms), the kitchen was pretty smelly and not so clean-- but never a pest.
I remember once that someone actually left plates of food on the floor in the lounge for 2 days. Not even 1 ant.
I moved to that place because I was in your situation before: I'd moved into a share house and on the first night I moved in, I went to the kitchen at 2 am, turned on the light, and two giant roaches were chillin' on the table like they were my roommates before another giant one came down the wall to join them. They chose the table, I suppose, because the floor was covered in ants. I got out of there in 1 week with my rent returned and on the last night, 2 of those suckers invaded my room because they knew what was up. I slept in an internet cafe that night.
I don't know about their other locations, and Raise House is kind of an iffy company, but that Nishi Kasai guest house was awesome.
