Slots at the two large-scale centers on May 24 were initially filled quickly but the booking pace has slowed of late. At the Tokyo center, about 113,000 of the 140,000 vaccination slots for next Monday through June 27 were unfilled as of Thursday morning, while about 48,000 of the 70,000 slots remained open at the Osaka center, according to the ministry. Japan aims to complete the vaccination...