By Yoko Kubota 

TOKYO--Toyota Motor Corp. tapped a foreigner as an executive vice president for the first time in the company's nearly eight-decade history, in an attempt by the Japanese auto maker to shake up the ranks of its largely uniform senior management.

Didier Leroy, a 57-year-old French national who currently oversees Toyota's European business, will become executive vice president in charge of developed markets, Toyota said Wednesday. The company also named its first female managing officer, and its first African-American managing officer.

The appointments aren't just significant for the world's best-selling auto maker, they also represent a shift for Japan, where top posts at major corporations are mostly held by Japanese men, though recently some companies have brought in more foreign and female executives.

Faced with an aging domestic population and the realities of the global marketplace, Japanese companies have come under pressure to diversify their ranks in recent years.

Much of Toyota's prosperity today is due to its overseas operations. Toyota, Japan's biggest company by profits and market capitalization, sells around 83% of its vehicles outside of Japan and manufactures around two-thirds of its vehicles overseas. Its biggest rivals are General Motors Co. and Germany's Volkswagen AG.

But Toyota still has many deeply-rooted corporate traditions such as a seniority system and a higher management structure that is dominated by Japanese men. Akio Toyoda, the president of the company and the grandson of the auto maker's founder, has been trying to take a more globally minded approach.

In 2013, he added directors from outside the company for the first time ever, including Mark Hogan, an American and a former GM executive. The company now has seven non-Japanese managers among its 63 top executives including auditors and supervisors. It also employs one Japanese woman as an external auditor.

Japan Inc. has seen some small waves of Western executives. In the auto sector, Carlos Ghosn, a Brazil-born French citizen of Lebanese origin, turned around Nissan in the 2000s and continues to serve as the chief executive officer of both Nissan and its alliance partner Renault.

On Wednesday, Takeda Pharmaceutical Co. said it would promote Christophe Weber, a Frenchman who is currently chief operating officer, to chief executive officer effective April 1.

But such instances are few and far between. A survey by a researcher at a government-affiliated think tank of nearly 3,400 major Japanese companies showed that 99% of firms don't have any foreign board members.

Mr. Leroy, currently a senior managing officer, joined Toyota in 1998 after working at Renault SA for 16 years. Since then he has been rising within Toyota's internal ranks. "He knows Toyota even better than many Japanese employees," a former Toyota executive who knows Mr. Leroy said. "This is a sign that Toyota has nurtured non-Japanese talent with a strong understanding of the company."

Julie Hamp, now chief communications officer for Toyota Motor North America, will be based in Japan and will cover communications as a managing officer. Christopher Reynolds, Toyota Motor North America's chief legal officer, will take on his current role in a global capacity.

Mr. Reynolds was involved in Toyota's $1.2 billion settlement with the U.S. Justice Ministry last year over investigations involving safety problems, which came after an accident in the U.S. in 2009 that led to complaints of unintended acceleration in some Toyota vehicles. More than 10 million Toyota vehicles were recalled in the U.S.

On top of improving diversity, Toyota, which was widely criticized for its slow decision making during the recalls, hopes to further speed up day-to-day decisions by delegating those types of responsibilities to senior managing officers and lower-ranking executives. Executive vice presidents, meanwhile, will focus on achieving longer-term growth. Toyota also said it would scrap specific areas of responsibilities for most executive vice presidents so they can act more broadly.

One of Toyota's key promotions was for senior managing officer Shigeki Terashi, who will become an executive vice president. Mr. Terashi, an engineer who has held key positions in North America, will oversee a new department that develops strategies for connected vehicles including autonomous driving technologies.

Toyota also made appointments aimed at boosting the competitiveness of its group as its auto parts suppliers face big German rivals such as Bosch and Continental AG.

To bolster ties with its key suppliers, it named a senior managing officer from group company Aisin Seiki Co. and a managing officer from Denso Corp. Toyota holds a 23.2% stake in Aisin and a 24.7% stake in Denso.

For the first time ever, Toyota also promoted a former factory worker to the role of senior managing officer.

Executive vice president appointments are effective after Toyota's annual shareholders' meeting that is expected to take place in June. Appointments for senior managing officers and managing officers are effective April 1.

Write to Yoko Kubota at yoko.kubota@wsj.com

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