Several executives resigned from the Tokyo Stock Exchange today in apology for its handling of the massive trading mistake by Mizuho Securities Inc.

TSE chief executive Takuo Tsurushima resigned, as did Sadao Yoshino, who is in charge of TSE’s computer system, and managing director and executive officer Tomio Amano. Taizo Nishimuro, chairman of the exchange, will take over from Tsurushima as chief executive officer in the interim.

In addition, other top executives are taking a voluntary 10% reduction of their monthly salary for three months. Strict censure will be given to the director of the equity division, Masaru Tokita, and the director of systems development for the trading division, Hiroshi Sato.

The exchange is receiving some of the blame for the massive trading error because its systems did not allow Mizuho to cancel the erroneous order quickly enough. Also, earlier this year, the exchange suffered a systems meltdown that briefly interrupted trading.

“We all the executives and staff of the TSE devote ourselves to prevent from a reoccurrence of such problem in the future. We ask for your kind understanding in this matter,” it said in a statement.