Given the question: Facts: - title: emperor of japan - caption: kokaku - reign: 1780 -- 1817 - successor: ninko - death date: 11 december 1840 - predecessor: go-momozono - father: prince kan ' in-no-miya sukehito-shinno - birth date: 23 september 1771 - name: kokaku - image: emperor kokaku.jpg - religion: shinto Based on these bullet points, write a short biography describing the life of emperor kokaku .
The answer is:
kokaku 's reign spanned the years from 1780 through 1817 .