Every season of UNDER NINJA ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of UNDER NINJA!

Within the shadows of Japan, a covert battle wages on. Around 200,000 ninjas still exist carrying out deadly missions as a secret organization, National Intelligence of NINJA, or NIN. But a challenger arises: UNDER NINJA. Known as UN, these ninjas oppose NIN at every turn. One such UN is Kuro, a high school loner sent to the front lines. What will be his fate and which faction will prevail?

The Best Seasons of UNDER NINJA

Every season of UNDER NINJA ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of UNDER NINJA!