Masatoshi Ito, the Japanese billionaire who turned 7-Eleven convenience stores into a global empire, has died aged 98, closing the chapter on one of Asia’s most storied retail entrepreneurs.

Seven & I Holdings (SVNDF), operator of 7-Eleven, confirmed the death in a statement on Monday, adding that Ito died from old age on March 10.

“We would like to express our deepest gratitude for your kindness and friendship during his life and respectfully inform you of his passing,” the company said.

Ito transformed everyday retail in Japan, turning a US-born company into an international brand, particularly in Asia where 7-Eleven shops are rarely more than a few minutes’ walk away in many cities.

Seven & I Holdings now operates over 83,000 stores around the world, including 7-Eleven shops in 19 regions and countries as well as the Speedway convenience store chain in the United States.

Chief competitors include the Japanese-owned Lawson and Family Mart convenience store franchises, but neither has reached the sheer size or global reach of the 7-Eleven empire.

Ito’s business acumen was influenced by his friendship with the late management consultant Peter Drucker, who described Ito as “one of the world’s outstanding entrepreneurs and business builders.”

In a 1988 interview with The Journal of Japanese Trade and Industry, Ito said he traveled to the US in 1960 and “experienced a kind of cultural shock at how rich everybody seemed” at a time when Japan was recovering from the aftermath of World War II.

“I became particularly conscious of the sheer size of America’s consumer society and the distribution techniques that made it all possible,” he was quoted as saying.

“It then occurred to me that people in different cultures still have basically the same desires, assuming that they are at the same of development, and I thought that Japan’s distribution system would become more like America’s as the Japanese consumer society grew bigger.”