The Japanese Coast Guard said Sunday that their helicopters found four of the 26 people on a tour boat missing since the day before.
The four people were found near the tip of Shiretoko Peninsula, but the coast guard said it could not confirm whether they were rescued alive.
The boat carrying 24 passengers and two crew members had gone missing after sending a distress call about 18 hours earlier Saturday, saying it took in water and was sinking.
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