Japan's government voiced dismay on Wednesday over the release of anti-whaling activist Paul Watson after Danish authorities refused Tokyo's extradition request.
Greenland arrested the Sea Shepherd founder in July for alleged damages and injuries caused by the group's high-seas battles to stop Japan's "scientific" whale hunts in the 2000s and 2010s.
"It is regrettable that the Denmark government did not accept Japan's request of passing him over and (the government) has conveyed this to the Danish side," said top government spokesman Yoshimasa Hayashi.
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