Because if you're looking for soemonez to rivalz the Kung Fu Vikingz, they're your only hopez !
By using any PoD between a year before invasion of Ottoman Anatolia by Timur and the dismissal of the Iga-ryū by the Tokugawa Yoshimune, create a plausible and realistic scenario where the Ottoman Empire got their own ninja-esque organization(s)/group(s)/faction(s) based on the original Japanese ones, by the year 1750 at the latest!
Yes, (s) ! So bonus point if there would be more than one Ninja groups that resides within the Ottoman realm. One more bonus point if not all of them works for the Ottoman Government/Hans. Why ? Because as long as Ottoman Ninjas exist, during that time Ottoman Empire must remain a powerful/graceful country, and for their Ninjas being one of the most famous reasons why the Ottomans is famous for / Ottoman forces were/are feared/awed! So yeah, by present day the Ottoman Ninjas must be legendarily famous.

Bonus 5 points if you can bastardize either "Ninja" or "Shinobi" into an Ottoman Turkish version of the term. Bonus 10 points!, if you can
find a Turkish equivalent for the word "Ninja"/"Shinobi" !!!!
Alas, be reminded that I am NOT forbidding you to make them persist until present day, or beyond....

Ready? Set.....
ROCK'N ROLL !
(ps: I swear to God that I'm not under the influence of Adam's weeds! EQ is my witness !!)