Japan has appealed to the Netherlands to take action against a Dutch-registered vessel that collided with a Japanese whaling ship in the Southern Ocean on Sunday.
The Bob Barker, belonging to the militant conservationist group Sea Shepherd, came into contact with a Japanese harpoon vessel while trying to disrupt the hunt. Both ships were damaged and each side has blamed the other for the collision.
Chief Cabinet Secretary Yoshida Suga told reporters in Tokyo on Monday that the environmental group's actions are extremely dangerous and completely unacceptable.
The Sea Shepherd vessels harass Japanese whaling ships every year in attempts to force them to end their whaling expeditions.