In 2010, Münter became involved in protests against the hunting of dolphins in Taiji, Japan and became a volunteer for Save Japan Dolphins. On September 2, 2010 Münter visited Tokyo with dolphin activist Ric O'Barry to deliver a petition asking for the hunting of dolphins to be stopped. She returned to Taiji, Japan again for two weeks in October 2010 and documented two dolphin hunts while she was there. Münter recorded a video from Taiji for the project One Day on Earth on October 10, 2010. She returned to Taiji in September 2011 with O'Barry; the effects of Typhoon Talas led her to report on Huffington Post that she understood water stress issues around the world in a much deeper way than before. She recorded the first dolphin hunt of the 2011/2012 hunting season on September 7, 2011.