The Japan World Exposition, Osaka, 1970 or Expo 70 was a world's fair held in Suita, Osaka Prefecture, Japan between March 15 and September 13, 1970. Its theme was "Progress and Harmony for Mankind." In Japanese, Expo '70 is often referred to as Ōsaka Banpaku (大阪万博). It was the first world's fair held in Japan and in Asia.

Kenzō Tange was a Japanese architect, and winner of the 1987 Pritzker Prize for Architecture. He was one of the most significant architects of the 20th century, combining traditional Japanese styles with modernism, and designed major buildings on five continents. His career spanned the entire second half of the twentieth century, producing numerous distinctive buildings in Tokyo, other Japanese cities and cities around the world, as well as ambitious physical plans for Tokyo and its environments.