(The most widely-accepted theory at present is that he was injured on his way to the Battle of Toba-Fushimi and developed tuberculosis on the boat he was being escorted to Osaka on.)
（現在は、鳥羽伏見の戦いに向かう間に負傷し、大阪に護送される船中において肺結核を患ったとする説が有力である。）