TOKYO — Juro Kara, who helped shape Japan’s postwar avant-garde theater, defiantly yet playfully transforming the essence of Kabuki aesthetics into modern storytelling, has died. Kara, whose real name was Yoshihide Otsuru, rose to stardom in the so-called Japanese underground movement of the 1960s known as “un-gura,” characterized by a kitsch rebellious style also found in his contemporaries Shuji Terayama …