Balancer

DISCLAIMER: During it's initial serialization in Weekly Shonen Sunday, "Balancer" (バランサー) was originally titled "Jap" (ジャップ) but was then changed due to controversy.

(from ebookjapan):

The Netherlands... is not the name of a country that is widely known, but the name of a province. In the Netherlands, there was a Japanese mercenary named “Nango Hyoue” (code name “J”), a survivor of the Hida Shirouwashu (ninja).

"J" had achieved many successes by utilizing his ninja combat techniques, but while on a mission in a distant land, he was attacked by his sworn enemy, the Kuroushu, and...!

This is an action work depicting the national agenda and the problems of the Shirohashu, Kurohashu, and Akahashu!