You don't know good value.
e.g. this place is around 200,000 yen/month:
But right across from the train tracks, but much livelier neighborhood, but a bit dreary because for japanese people... will look for nicer ones later. I´ll point out again that the Duplex properties are fine and not expensive. Also there are https://www.sumitomo...ish/lp/?trflg=1
And something like this:
Regarding the airbnb, you're really reading too much into the names, etc. Not saying the host can't cancel on you last moment.