A prominent backchannel political figure between Japan and China has died, days before a reported planned trip meant to ease deep bilateral tensions. Yohei Kono, best known for his historic apology on August 4, 1993, to tens of thousands of “comfort women” who were forced by the Japanese military into sexual slavery during World War II, died on Monday. He was 89. Considered a moderate voice within Japan’s conservative ruling Liberal Democratic Party (LDP), Kono was the country’s chief cabinet...