After becoming Toshiba's president in 1996, Nishimuro used his wealth of professional experience honed in the U.S. to reshape the Japanese technology group's business structure, organizing its segments into internal companies. However, Nishimuro's reputation became clouded during his final years after Toshiba's accounting scandal came to light.
Nishimuro graduated from Tokyo's prestigious Keio University with a degree in economics in 1961. He then entered the ranks of Tokyo Shibaura Denki, now known as Toshiba. Nishimuro assumed the title of chairman in 2000. He stepped down to an advisory role in 2005, but still wielded great influence over the group.
That same year, Nishimuro was installed as chairman of the Tokyo Stock Exchange. He was then named to a government panel geared toward privatizing Japan Post, which led to his appointment as president of the same company in 2013.
Japan Post under Nishimuro listed in the TSE's first section and acquired Australian logistics firm Toll Group. Nishimuro retired from that post last year, citing ill health.
Nishimuro served as vice chairman for the Japan Business Federation, the powerful business lobby known as Keidanren. He also chaired the panel that advised Prime Minister Shinzo Abe ahead of the 2015 address commemorating the 70th anniversary of the end of World War II.