1) 亙古こうこ #316,499 Link copied! こうこ [1] ✨ Meaning Shirabe Noun Archaic from long ago up until the present day See also: 亘古 (こうこ) Kanji 亙 コウ range, reach, extend 古 コ old Forms 亙古#316,499亙古こうここうここうこ