Hiromi Yamaji is the president of the Tokyo Stock Exchange (TSE). He took over that role on April 1, 2021 from Koichiro Miyahara, who resigned after the exchange had its worst-ever outage in October 2020. TSE is also owned by the Japan Exchange Group.
Yamaji was previously president and CEO of the Osaka Exchange, a subsidiary of the Japan Exchange Group. He also was a member of the board of directors for both companies. He held the post of CEO starting in June 2013.
In 2022, Yamaji was inducted into the Futures Industry Association's Futures Hall of Fame, which was established in 2005 to commemorate outstanding contributions to the global futures and options community. 
Yamaji began his career in 1977 when he joined Nomura Securities Co., a company which has since become part of Nomura Group. He held a number of positions in his 36 years with the company, with the first of note being as the manager of the company's Europe Investment Banking Industry Business Operation Unit in 1994. He moved up the company ladder, and was named the CEO of the global investment banking sector of the company in 2002. He was named as an executive vice president of the company in 2012, after holding the role of CEO and president of their subsidiary Nomura American Investment Inc, since 2009. In 2013, he moved on to become a director in the Japan Exchange Group and became president and CEO of the Osaka Exchange Group.
Yamaji holds a bachelor's degree from Kyoto University, and a master's degree from University of Pennsylvania.
The Osaka Exchange might be looking for more institutional activity, but its night sessions see a lot of action already. President & CEO Hiromi Yamaji said that after extending the night session to 5:30 a.m. Tokyo time, the overall share of trading activity that occurs at night rose to more than 42 percent in May. When it comes to the Nikkei 225 mini, nearly 50 percent of trades are executed during the night session.
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