From a Japanese press release in January:
The Steve Irwin called the Japanese vessels stating: “We have come to help in the search for the missing crewman”.
The Japanese vessels responded: “We will not accept any help nor cooperation from the Sea Shepherd who has been harassing our research vessels”.
Steve Irwin responded: “We will restart harassing the whaling vessels once the search is over”.
The Institute of Cetacean Research website has many enticing videos of their victimization at the hands of the rogue eco-warriors: