"Ninpo" term reference
There was a thread over on MAP debating the validity of the term "ninpo", some where saying that Takamatsu-sensei made it up.
Since there was another thread linking the new Shoninki translation I decided to type up the table of contents from Nakashima Atsumi's book on the Shoninki which includes a modern interpretation of the original which is written in Kanbun from 1681.
Included in his book is the reprint of the original and explanatory notes as well including the furigana on how to pronounce/romanize some of the obscure terms. Everyone who has released or is planning on releasing a translation has used Nakashima's book for reference.
As I was typing up the layout of the Shoninki and trying to go back to the original kanbun for reference I found the term/word "ninpo" located on page 396. So there ya have it folks, Takamatsu-sensei invented no such term/word and has been in use since at least 1681. Possibly there is a earlier reference but I have yet to see it.
Eric Weil
"Kuji first, Taijutsu last"