KYOTO—Researchers here said they uncovered the apparent remains of the Dairi imperial residence of the Heiankyu palace, the locale for Heian Period (794-1185) literary classics “The Tale of ...

a master swordsmith of the Heian Period; a short sword made by a master craftsman of the Kamakura Period (1185-1333); and a ceremonial dagger of the Imperial Government Railways from the Meiji Era ...