By David Dolan TOKYO (Reuters) -Japan’s coast guard used aircraft and patrol boats on Saturday to search for a tour boat with 26 people on board after it sent word it was in trouble off the northern island of Hokkaido, a coast guard official said. The coast guard heard from the crew of the “Kazu I” at around 1:15 p.m. (0415 GMT) that water was flooding into the vessel, the official said. The boat had been on a sightseeing cruise around the Shiretoko Peninsula, which is famous for its wildlife and dramatic coastline. The ship was last heard from at around 3 p.m. when it contacted its operating …