glenmore79

This would be unlikely since the Togakure school is probably a reconstruction/invention derived from Kukishin and a great deal of original research from Toshitsugu Takamatsu.

There are many instances of people discovering ninjutsu related documents in their family, but ninjutsu is fundamentally a set of Sengoku-period strategic techniques and not so much hand to hand fighting.

You might have informal training passed on within families, but a Ryuha is fundamentally a social institution that, while passed from one family member to another, are really only family managed and not "exclusive" -- if it's just in the family, the whole Ryuha system is unnecessary.

I mean, if your Dad teaches you a few tricks it's not really a "secret family martial art."