I'm sure someone will chime in with a great resource but here's a tip regarding Google Maps.
You can create an account with Google (unless you use Google calendar or Gmail in which case you'll already have one), go to "My Maps" in the upper left corner and select "Create new map". Select the area you want and click on "Edit". You now have the ability to drop markers with labels, draw lines, shapes, etc.
Edit :
Here's your page in Japanese :
http://www.ic.keio.ac.jp/intl_studen...ryu_boshu.html
If you input the address into maps.google.jp, it comes up with the location.