Ninja is a Sino-Japanese compound derived from the two kanji (Japanese characters of Chinese origin) used to write shinobi-no-mono one of the native Japanese words for people who practice ninjutsu (sometimes transliterated as ninjitsu). Ninja and shinobi-no-mono along with shinobi another variant became popular in the post-World War II phonetically with the kanji has been traced as far back as Japans Asuka period when Prince Shotoku is alleged to have employed one of his retainers as a ninja. This is a fighting games between two ninjas you can choose your ninja at first and then in the battle use the keys A and D to attack arrow keys to move spacebar to launch special attack.