ここん 古今 Common word LinksSentence search for 古今Sentence search for ここんSentence search for こきんKanji details for 古 and 今Edit in JMdict Noun, Noun which may take the genitive case particle 'no'1. ancient and modern times; all ages; past and presentOther forms古今 【こきん】Notesこきん: Out-dated or obsolete kana usage. Discussions Log in to talk about this word.