EntityQ1373070· pop 16· linked from 294 articlesKōninSign in to saveJapanese era spanning from September 810 through January 824ConnectionsInternational Standard Book NumberEntityMeiji restorationEntityAtomic bombings of Hiroshima and NagasakiConceptEmpire of JapanEntityhistory of JapanEntity2011 Tōhoku earthquake and tsunamiEntityRusso-Japanese WarEntitySecond Sino-Japanese WarEntityAttack on Pearl HarborConceptBoxer RebellionEntityFirst Sino-Japanese WarEntityPacific WarEntityTokugawa shogunateEntityEdo periodEntityMeiji eraEntityNational Diet LibraryEntityGoogle BooksEntityKojikiEntityHeian periodEntityJōmon periodEntityCategories810s in Japan820s in Japan9th-century neologismsJapanese eras