Being criticized for his manner when he visited Tohoku, Ryu Matsumoto, Minister in charge of recovery and reconstruction for the Kan Administration, apologized to Tohoku people if "his words had hurt the feelings of people in the disaster area in Tohoku", and defended himself by saying:
"I'm from Kyushu. People from Kyushu talk tough."
"I have the Type-B blood, so I may be short-tempered."
And it looks some people in Kyusu and from Kyushu and some people in Japan with the Type-B blood are highly offended by the association. Japanese are 39% Type-A, 29% Type-O, 22% Type-B, and 10% Type-AB.
And no, he has no plan nor intention to resign.
If you read Japanese, go to this link to read his excuse.