"We are confident that this campaign - one of the most successful campaigns we've had to date in the Southern Ocean has led to more than 750 whales saved.''
During the campaign, Mr Hammarstedt accused the whalers of attacking his ship on three occasions.
"My vessel still bears the scars on its hull from a collision with one of the Japanese harpoon ships.''
He said 250m of steel cable were dragged across the bow 43 times - "during one of those passes the harpoon vessel collided with my ship, causing substantial damage to my starboard bow''.
Sea Shepherd New Zealand coordinator Michael Lawry said the Japanese had been "very, very aggressive during the whaling season''.
"They've also shown themselves to be very desperate and deeply offensive to the people of New Zealand by coming into our EEZ.''
Last month the Shonan Maru No. 2, which provides security for the Japanese whaling fleet, entered New Zealand's 200 nautical mile exclusive economic zone (EEZ).
The action prompted a rebuke from Foreign Minister Murray McCully, who said it we was "disappointing''.
Today, Mr Lawry called on the Government to step up and police Japanese illegal whaling practices.
The Bob Barker would be docked in Wellington for the next 10 days in which the ship would be open to the public for tours.