You can read more and see the photos at the Tokyo blog
Here is a link (by babelfish.altavista.com translator / sorry for the horrible translations) to the Chiba Bike Polo club.
Let me give you a little run down of what I got from their blog article, and share with you their photos of the aftermath.
A few miles to the east of Tokyo, is a little bayside town called Chiba. Closer to the water, and of course, to the epicenter of the 9.0 quake. The photos of the liquefied ground where they used to play polo are just incredible.
|Makuhari seaside park|
|The spot where they play motorcycle polo on the beach|
|Also Makuhari seaside park|
Here is a neat little video illustrating liquefaction.
There is still a lot of work to be done, and a lot of support to give.
Tokyo, stay strong and good luck.