弘こう治じこうじFreq.FrequencyTop 100,000Meanings1nounKōji era (1555-1558)Japanese era name spanning from October 23, 1555 to February 28, 1558. Used in historical contexts.弘こう治じ年ねん間かんにこの城しろが築きずかれた。This castle was built during the Kōji era.