Exclusive Summer Grand Sumo Tournament capsule toys, miniature trinkets in plastic capsules available from vending machines, are proving a hit among local and foreign visitors of all ages at the famous sporting event. The rare collectibles, dispensed from machines installed at Tokyo’s Ryogoku Kokugikan, mostly feature top-division wrestlers known as sekitori, and can include keychains shaped like the traditional cushions used by the wrestlers, as well as the referees’ acrylic display stands. “We didn’t expect so many people to line up for this,” a Japan Sumo Association official said, adding t…