In Japanese: http://www.asahi.com/national/update/0322/TKY201103220507.html
Summary: A dolphin was found swimming around a flooded rice paddy 2 km from shore. It was washed ashore by the tsunami. The water in the paddy was still mainly ocean water so the animal was alright. It was rescued by a group of volunteers who have organized themselves to help pets that are orphaned or lost after the catastrophe. They have rescued 80 cats and dogs so far. [This seems to be the first dolphin they have rescued.] They called the local aquarium but the facility is damaged and could not take the animal, so they wrapped it in a wet towel, drove it back to the ocean, and let it go. It was probably a young animal, judging from the size and color. . . . I gather it was last seen swimming out to sea. - Jed

