Kamui no Ken was a sort of samurai/ninja story set during the transition of the fall of the Tokugawa Shogunate and the re-establishment of Japan under the Emperor Meiji in 1868.
俺は侍の道で生きてる。
I live by the way of the samurai.
現代の日本に忍者や侍はいません。
Nowadays there are no ninjas or samurais in Japan.