The series follows the adventures of Fuusuke, Aicho and Toji, along with Toji's sister and a penguin. Long ago, a civil war erupted between the imperium and the ninku clan. The ninku were a fierce group of ninja with classical majic ninjutsu, divised into 12 ninku corps. All three of the guys were captains of their respective corps. Eventually the ninku were disbanded as the war went sour and now the remaining three are trying to find a way to defeat the imperium.
Although the show was once dubbed it was never released in the US although it did run on AXN in Southeast Asia. Only the dubbed movie was ever released in the US courtesy of Media Blasters. Most the episodes can be found at Veoh but only a few of the beginning episodes will be subbed.
This series is notable for being the inspiration behind Naruto, although some would lean more towards plagiarism, seeing how similar the Rasengan and the Kuatsuken are. Masashi Kishimoto even initially drew Naruto in an outfit similar to Fuusuke.
Also has an ongoing sequel known as Ninku-second stage which started 2005.
Ninku provides examples of:
- Airborne Aircraft Carrier: Although it doesn't really carry aircraft its almost like a tank.
- All Men Are Perverts: Toji picks up the slack for Aicho and Fuusuke.
- All Women Are Lustful: Toji's sister, Rihoko. This trait must run in the family.
- Alternate Continuity: The anime's story is completely independent of the original manga, and not only is the story completely different, some of the characters' personalities are too.
- An Ice Person: Kisume
- Armour Is Useless: Proven early on when a boastful bad guy gets a gaping hole to his chest.
- Award-Bait Song: The first ending song.
- Bare Your Midriff: Mekira
- Battle Aura: Fuusuke emits white smoke when it's time to get serious.
- Blow You Away: Fuusuke, aka Proto-Naruto. "Wind is my ally. I counter your attack with AIR PRESSURE!"
- Calling Your Attacks: KUATSUKEN!
- Conveniently an Orphan/ Parental Abandonment: One of the biggest differences between the manga and the anime is that in the manga Fuusuke's parents died before the start of the story.
- The Determinator: Fuusuke which is really saying something when a 12 year old boy happens to have more will power than the two grown men he has for comrades.
- Dishing Out Dirt: Toji is captain of the snake corp and generally uses earth moves that take the form of a pretty live looking giant snake.
- Doppleganger Spin: Used by Fuusuke because he is the fastest of the members and specializes on training the muscle groups in his calf.
- Eastern Zodiac: The 12 Ninku corps each are named under and animal of these.
- The Empire: The Imperium pretty much runs things.
- Everything's Better with Penguins: Hiroyuki the supernatural penguin capable of toxic farts and super strength.
- Fartillery: Hiroyuki(Fuusuke pet penguin) is capable of releasing explosives farts in the anime.
- This ability originally belong to Toji
- Gonk: Fuusuke, who sort of looks like a frog.
- Hand Seals: Not very often used except for particularly awesome moves and even then they aren't very many sequences.
- Highly Visible Ninja: Subverted in that when the clan was still around they covered their faces and wore dark colors. Once they had disbanded Fuusuke wears an ORANGE shirt. And don't even start with Toji.
- Hellish Pupils: courtesy of the Tenkuu dragon
- He-Man Woman Hater: Most definitely Aicho, who shows his utter disdain for every time Rihoko goes all fangirl on him.
- In a Single Bound: Aicho who was captain of the rooster corp who would probably give blaziken a jump for its money.
- Loincloth: Toji.
- Making a Splash: Kokuro
- Missing Mom: Fuusuke's mother was taken from him when he was even younger and smaller than he was. that guy ended up being the main bad who was completely destroyed, proving don't mess with Fuusuke.
- Ninja Brat: He's the protagonist, Fuusuke.
- Ninja Log: Used in that rare breed of heroic escapes typically reserved for Villain: Exit, Stage Left.
- Old Master: The Ninku master who true to his name mastered all the known elements.
- Our Dragons Are Different: Dragons represent the purest form of the Ninku art but they aren't physical beings. The ultimate dragon is the Tenkuu Dragon.
- Outlaw: All Ninku are after they brought the imperium to near ruin considering how few their numbers were in comparison.
- Playing with Fire: Youkou
- Razor Wind: Fuushuriken.
- Real Men Wear Pink: Toji
- Shock and Awe: Col Ajirada.
- Sinister Minister: Kouchin
- Spiritual Successor: Naruto came almost 5 years after it ended.
- Walking Shirtless Scene: Toji.