Harvard Professor Emeritus Ezra Vogel, a U.S. expert on Japan and China, has died at the age of 90, the university's Chinese studies center said Sunday.

In Japan and among many international scholars of the country, Vogel’s 1979 book “Japan as Number One” became one of the late 20th century’s most influential works.

Offering praise of Japan’s business practices after World War II, it was a bestseller in Japan and inspired serious study abroad among a generation of undergraduate and graduate students — especially in the U.S. — of Japan’s economy, corporate culture and society.