Japan says the whaling catch in its latest Antarctic hunt fell far short of its target after disruptions by anti-whaling activists. It killed 679 minke whales despite plans to catch around 850.
Just one fin whale was caught, compared with a target of 50 in the hunt, which began in November.
Some ships in Japan's six-ship fleet have returned home after clashes with the hard-line group Sea Shepherd Conservation Society, including a collision that crushed a railing on one of the Japanese ships.
A Fisheries Agency official said ships could not carry out whaling for a total of 16 days because of bad weather and skirmishes with the activists.
