I'm stationed in NAF Atsugi, so I'll drop my two cents:
Tokyo and its surrounding areas didn't suffer too much, the tsunamis hitting mostly northern Japan in and around Sendai the hardest. That place is a complete wreck. I fully suspect people like myself to be kept here past our order expiration to help clean up. Yokota, Yokosuka, Atsugi and Zama military bases only suffered minor damage, no one has been reported injured or dead. Military aid is already en route, most of the 7th fleet is mobilized and ready to get in with the cleaning.
As someone who's lived here for two years, my biggest concern being... that was a huge fkin quake right next to a waking volcano (Mt. Fuji) Lets hope that fker don't blow his stack, because we'll get trashed beyond repair if that happens.