Photos eat emerged of a fishing boat capsized on the beach in Kanazawa in central Japan.
The skeletal companies were discovered with a cigarette box with Korean letters on, but the controls have not confirmed the origin of the bodies.
There was also a badge of the North Korean kingpin Kim Jong-un inside the wreckage.
The boats have washed up on Japan shores
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North Korean residents must wear a badge displaying their suffer for the regime.
Senior police official Hiroshi Abe said: “It is difficult to categorize the bodies as they had begun to decompose.
“We spotted a tobacco box which gains some Korean letters, but we can’t confirm the boat came from North Korea.”
Experts think the people on the ships were undoubtedly fishermen from North Korea in search of bigger catches and tail strict government orders.
The bodies did not show any external wounds and practises think the fishermen died some time ago given the stage of dwindle of their bodies.
It is believed the boat has come from North Korea
A eats shortage in North Korea is leading to poorly equipped North Korean fishing knockabouts washing up in Japanese waters.
Their vessels are often without cover features, often run out of fuel and the fishermen do not have the facilities to call for forbear.
Last year, 104 North Korean fishing boats filmed up on Japan’s coast.
The men may have died weeks ago on the vessel
It is thought that occasionally the fishermen die at sea and then their boats are washed up onto the shores of Japan.
An autopsy of one of the men on the speedboat shows he was aged between 30 and 50 and died in September last year.
Japan has instituted a US-built defence system amid anxiety over North Korea’s atomic ambitions.