NARA PREFECTURE, JAPAN—The Asahi Shimbun reports that a square burial mound measuring nearly 230 feet per side has been found in Asuka, the ancient capital of imperial Japan. The vast tomb is surrounded by a stone-lined moat, which was discovered in 2014. Researchers have also found remnants of a passage to the burial chamber, which they think could hold the remains of Emperor Jomei, who lived from A.D. 593 to 641, or Soga no Emishi, a warlord who died in 645. To read about another recent discovery, go to “Japan’s Early Anglers.”