There will be a Nobunaga Walking Tour that will be held on April, 21 2013. According to the link there will be two courses to choose from. First course is Kiyosu Castle to Atsuta Shrine and the second course is Arimatsu Okehazama Battlefield to Atsuta Shrine.
I would love to experience this myself and it is interesting. For those who plan to participate, please by all means share your experiences.
Mikawa-Hide has provided the link: http://ameblo.jp/mikawa-hide/entry-11487692979.html
Tenka no tame!