Today, CASBAA (the Cable and Satellite Association of Asia) sent me an email (with the heart above), pointing to a list of charities helping people recover from the Japanese earthquake (東北関東大震災).
Here's a selection of those charities: Habitat for Humanity, Oxfam, Red Cross, Save the Children, Unicef and World Vision. The Associated Press has a full list here.
Japan's national broadcaster, NHK, recommends making bank transfers to the Japan Red Cross (日本赤十字社) or the Central Community Chest (中央共同募金会). NHK also provides a list of links other useful resources.