 On the night of December 22, 1948, Matsui met fellow condemned inmates Hideki Tojo, Akira Mutō, and Kenji Doihara at the prison chapel. As the oldest member of the group, Matsui was asked to lead them in shouting three cheers of banzai to the Emperor. Then he led the group up to the gallows where they were all hanged simultaneously shortly after midnight on the morning of December 23, 1948.
