Hunt is the first since the U.N.'s top court ordered Tokyo to stop killing the animals in the Antarctic.
Recently, the UN ordered Japan to stop their annual whale hunt because it's illegal. Trace explains the history of whaling, and why we don't need it anymore.
The top court ruled the program was a commercial activity disguised as science.
The western Pacific gray whale once seemed destined for extinction. Now it supports a booming tourism trade. ->
The discovery of radioactive cesium in minke whales off Japan seems unlikely to boost the country's whale meat market.