You've gotten your driver's license renewal notice in the mail (it's in Japanese - make sure you don't just toss those Japanese language postcards in the rubbish bin!) so you now know it is time to go renew your license.
If you don't read Japanese have a friend, secretary, lover, etc. help you figure out what it says & which license renewal center you can go to.
If you live in one of the 23 Tokyo wards, and if this is your first renewal, you'll most likely wind up going down to the driver's license center in Samezu. If you don't know where that is have someone tell you how to get there either by train, bus, taxi, or car. If you drive yourself the parking is free - good thing it is, 'cause you're gonna be there a while.
Step 8: Okay - you've made it through the class, duly informed of the rules & regulations as well as the evils of drinking & driving in Japan (hey, if you do that you don't deserve to have a license anyhow!), and now you get to go up to the 3rd floor & turn in that remaining part of your form for your license. It's up to you to check your license - make sure it's yours (do you really look like that picture?!) and make sure the info on the license is correct. Of course, it is written in Japanese, but of course, so is everything else there at the Samezu center.
That's is - anything from 2 1/2 to 4 hours or so later & you're on your way with your new license in your pocket & 3 books of Japan's driving rules & regulations (in Japanese) in hand. Have fun - safe driving - and don't you dare drink & drive (you do know the penalties for that here - right? - talk about severe!).