However, he became sick during his stay in Kyoto and eventually died on January 2, 1864 (according to 'Mitosama Keifu' [The Genealogical Record of the Mito Family], he died on June 14, 1864.)
しかし、文久3年（1863年）11月23日、京都滞在中に病気にかかり死去した（没日は「水戸様系譜」では元治元年（1864年）5月11日となっている）。