Discovery posted this video—from 2009—of Japan's Cat Island, which is a small island home to about 100 "mostly elderly" residents and a whole lotta cats. Post tsunami it's reportedly above water, but short on supplies. Japan Earthquake Animal Rescue and Support provided this update:

Just to give everyone an update on Tashirojima, the cat island. The people and cats are safe but short of food. A volunteer looked into transporting food by boat, but there is too much debris in the water. A helicopter is the only way. The army will probably get a helicopter ready soon so we are looking into the possibility of asking them to take cat food too.

Pet Captain
has a list of links where you can donate to help out Japan's animal rescue operations—scroll down to the bottom of the list.)

(Via writer/occasional Merc freelancer Jamie S. Rich, who correctly pointed out that while "some people think it's silly when the subject of stranded pets come up during disasters... anyone with their own furry creatures know what they can mean to the people in their lives and how they can be part of the family.")