Ninjutsu has been mentioned less than a dozen times throughout the RSS channels we monitor. This location appears to be especially popular on the channel 'Wikibooks - Recent changes [en]' where it has less than a dozen mentions. As seen in the chart below, Ninjutsu had the highest popularity figure in August, 2016.

?Location Mentions History
Recent News
Ninja Food

Ninja Food

[...] about ninjutsu and his own experiences as a student, etc. I haven’t read the book in years but recently I was [...]

japanlifeandreligion.com

+
No more items

Ninjutsu related channels