Ninja keyboard Samurai keyboard Black and white

The simple explanation is that in ancient Japan a special organization with special " ninjutsu training" produced by the special war killer, special war spy. What it presents is the " organizational unit" form. And this " organizational unit" has many schools in Japan, there are official and unofficial nature. Basically, the birth of the product of " ninja" is completely related to the objective environment of the ancient Japanese " warring States period ". The ancient " warring States period" in Japan was like the " spring and autumn and warring States period" of early China, the city - States were divided and each was divided into politics. Everywhere is chaos and chaos and bloody, brutal killings and relentless fighting. The warlords and warlords who struggle for power and struggle each other urgently need to train a group of specialized infiltration units to quickly infiltrate the enemy lines for investigation, espionage, assassination, disruption and sabotage. The " ninja" was born in such a dangerous and dangerous environment