The tourism ministers of Japan, China and South Korea vowed Wednesday to increase the number of travelers between their countries to 40 million by 2030. At the end of their two-day meeting in the Japanese port city of Kobe, Tetsuo Saito, Japan’s tourism minister, Zhang Zheng, China’s vice minister of culture and tourism, and Yu In Chon, South Korea’s minister of culture, sports and tourism, also agreed to expand flights to regional airports in the three nations. By fostering connectivity in local areas, the three countries aim to revitalize their regional economies, the ministers said in a joi…