Catwalker

  I am staying at, the building on the left
  is the Momodani train station. About 10
  feet separates them.

 Yet my room, located at the back of the
  building is nice and quiet and cool. I
  can hear the trains, but they are not
  very loud. The last trains run at
  11:00 - but they run every 10 or
  so minutes through  the day.

This is the hostel during cleaning time.
Sheets and other clothing items drying
in the sun.
It's a decent place, convenient and
inexpensive. Momodani station is
on the Osaka Loop line, the main
station for which is Osaka station.
Or you can use Tennoji station,
both have interchanges to other
lines.