The 2010 Oscar for best documentary has been won by The Cove, a film which follows an annual dolphin hunt in the Japanese town of Taiji.
Directed by Louie Psihoyos, the film follows activists as they try to gain access to a bay where dolphins are corralled and killed.
It has yet to be widely seen in Japan, where the government says catching dolphins is strictly controlled. Distributors say a modified version will open in some cities this year.
Journalist Peter Roth spoke to Mishal Husain about the difficulties making the film.
Impact Asia with Mishal Husain is broadcast weekdays at 1300, 1330 and 1400 GMT on the BBC World News channel. Find out more information about regional broadcast times