Hi,
I'm an TEFLing at the moment between two state-run schools in Southern Japan. One is 10 minutes away and the other is 30 mins. Don't know what that makes in miles. When I get to work I usually don7t change clothes unlesss it's raining and then it's a must, because it tends to be very heavy. My bikes is parked at school and I've been commuting for 11 months, year round.
Cheers