Just a quick note about Japan and rain and bikes, they do not mix well! Last tuesday I had to ride my bike to nogyo and it was raining (in fact it didn't stop all day). I was soaked within about 2 minutes of starting out and it was a really good think I'd packed dry clothes. There was just enough time for the people in the nurses room at school to wash them (spin cycle gets more water out, plus they were muddy) and get them dry before I had to put them back on to ride home (where I had to repeat the wash and dry process). It was a really long day.