建けん長ちょうけんちょうMeanings1nounKenchō era (1249–1256)Japanese era name (年号) spanning from March 18, 1249 to October 5, 1256 in the Julian calendar.建けん長ちょうは鎌かま倉くら時じ代だいの元げん号ごうの一ひとつです。Kenchō is one of the era names of the Kamakura period.