Firefighters and police officers transport rescued people from the missing tour boat “Kazu 1” from Japanese Self-Defence Force’s helicopters in Shari. Kyodo via REUTERS

An aerial view shows a Japan Coast Guard helicopter conducts a search and rescue operations for missing people boarded on the missing tour boat “Kazu 1” at the Shiretoko Peninsula. Kyodo via REUTERS

Japan Coast Guard’s ship conducts a search operation for missing people aboard the missing tour boat “Kazu 1” in the Sea of Okhotsk off Shiretoko Peninsula. Kyodo via REUTERS

Flotation devices from the missing tour boat “Kazu 1” drift at a rocky coastal area of the Shiretoko Peninsula in Shari, Hokkaido Prefecture, Japan. Japan Coast Guard

Rescue unit members conduct a search and rescue operation for those on board the missing tour boat “Kazu 1” at a rocky coastal area of the Shiretoko Peninsula in Shari. Japan Coast Guard