Henka is a term we use quite frequently in training and it refers to change or variation. BujinkanMartialArts.com is all about the Henka, in this case it's about being transformed through the changing of our thoughts (mind ), words ( spirit ) and actions ( body ) and in the process finding some enlightenment along the way.
Most likely this Henka tag will be reserved for misc items that may pop up from time to time or some Honbu News or announcements. As stated previously, the site will always be a work-nin-progress and can change entirely at a moments notice just like Taijutsu.
"Ninjutsu has always been passed down by Ninja who managed to find their way through the midst of confusion and doubt"