Dan currently filming the second task -
in forthcoming HP movie GOF. Summary:
According to danradcliffe.com,Dan was unable to attend the Japan promotion of POA because he is filming the second task of GOF in London.
Article:
Harry Potter stars Emma Watson and Rupert grint along with the director Alfanso Cuaron and producer David Heyman are in Japan promoting POA,but Dan talked via satellite.
On Fuji TV in Japan, they showed a clip of Dan saying :
quote:
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I'm very sorry I can't be with you today. I'm in London, filming (the subtitle says 'a scene in the water') of GoF at the moment. I hope I will come back for the 4th film, 'cause I love Japan. Last time when I was with David, it was absolutely fantasticngs via satellite in the Japan press conference.
Some days ago he said in starlog magazine about he filming the third task maze scene with other related actors.
www.danradcliffe.com 
Here is the pic in which dan was talking through satellite.