Answer
No, Kenzō Tange did not receive any major awards posthumously. The Pritzker Architecture Prize, considered the highest honor in architecture, is only awarded to living architects. Tange passed away in 2005, prior to receiving the prize. However, during his lifetime, he was recognized with numerous prestigious awards, including the AIA Gold Medal in 1987 and the Praemium Imperiale Award for Architecture in 1993.