Internationally renowned Japanese architect Isozaki Arata, who was recognized for his pioneering postmodern designs, has died. He was 91 years old.

Sources says he died of old age at his home in Naha City, Okinawa Prefecture, on Wednesday.

Isozaki was born in Oita City, southwestern Japan. He graduated from the Department of Architecture in the Faculty of Engineering at the University of Tokyo in 1954. He continued to study at the university's graduate school under Japan's preeminent architect Tange Kenzo.

Isozaki established his own studio in 1963. His early works were primarily in the Kyushu region where he was born and include the former Oita Prefectural Library and the Kitakyushu Central Public Library.

He captured international attention for his design of the Tsukuba Center Building in Ibaraki Prefecture, north of Tokyo, which was completed in 1983. It was considered an example of his postmodernism that challenged the standardization of modern architecture.

He was also acclaimed for his other works around the world, including the Museum of Contemporary Art in Los Angeles and the Palau Sant Jordi, an indoor arena for the 1992 Barcelona Olympics.

In 2019, Isozaki received the Pritzker Architecture Prize, a prestigious award often called the Nobel Prize of the profession.

The prize's organizers described him as "truly international," as he "was one of the first Japanese architects to build outside of Japan during a time when western civilizations traditionally influenced the East."