Board Thread:Naruto Discussions/@comment-1018594-20160409062530/@comment-25122992-20160622152855

Besides, I got an idea about one more thing, namely about Hashirama. We know that all the Asura's descendants were blessed with the exceptional life force and longevity. In Hashirama's case, we can see how Asura's chakra reincarned within him amplified these abilities to their peak: he gained an incredible life force allowing him to create a life itself (namely the vegetation, which became the Wood Release) and his longevity was taken to the point he could heal the injuries in the matter of seconds with no techniques involved (i.e. the Regeneration Ability).