The Truth About Real Japanese Kunai: History, Function, and Modern Throwing

When most people hear the word Kunai, they may think of a magical ninja throwing knife often depicted in anime or video games.

Thus, a common question we often get is: What is a real kunai, and can you actually throw them? 

In this article, we will review the history and anatomy of a real kunai knife, and showcase the best Japanese throwing knives which would make great additions to your collection.

The History of the Kunai: Tool vs. Weapon

Historically, the Kunai was not made to be a weapon of war. Rather, it was originally made to be a farming and masonry tool in ancient Japan. The Kunai’s leaf-shaped blade and ring on the pommel were designed for digging holes, prying open doors, or smashing plaster.

However, because Ninja (Shinobi) often disguised themselves as common laborers, they began to use the Kunai tool as a concealed weapon. It was readily available, didn’t raise suspicion, and could be used as a dagger or a climbing piton.

The Anatomy of a “Real” Kunai (Versus Fake Kunai or Toys)

If you search the terms “real kunai knife price,” on the internet, you will see a massive range of price points. This is because the market is flooded with cheap plastic or zinc-alloy toys which try to replicate the Kunai.

However, a real kunai is intended for sport throwing, and therefore, must have specific characteristics. Here are some things to look for in real kunai:

The Material & Steel

Where a fake or toy kunai will break upon impact, a real kunai thrower is typically made of stainless steel, and thus, will not break during target practice. 

For example, our rainbow ninja throwing knives feature a stainless steel full tang construction and titanium coating. This ensures the blade can withstand repeated impact against wood targets without snapping

The Weight & Thickness

In order to be thrown accurately, a real kunai knife needs length and mass. For instance, one of our standard throwers, the Z-hunter ninja kunai, feature an overall length of 7.5 inches; and weigh 9 ounces.

For those looking for a more serious impact, our perfect point blue lightning throwers are a beast. Each knife measures 9” overall with a massive 3mm thick blade. This extra thickness provides the momentum needed for long distance throws

The Handle Wrap 

You will notice almost all traditional Japanese Kunai feature a wrapped handle. For instance, our Z-Hunter throwing knives uses a green nylon cord wrap, while the cross flame set uses a black cord wrap.

Why? Historically, the cord wrap around the handle was used to provide an improved and secure grip. In modern throwing, it allows for a consistent release and absorbs shock.

Top Picks: The Best Kunai for Your Style

We have curated our top performers based on balance, durability, and aesthetics.

For the Tactical Thrower:

• The 6-Piece Kunai Throwing Knife Set: This traditional Japanese kunai throwing knife set is perfect for target practice. They feature stainless steel blades, nylon cord wrapped handle, and pommel. Comes with a nylon sheath for easy carry, storage, and transport. 

For the movie and video game enthusiast:

If you are looking for the classic “ninja” aesthetic but with real world functionality:

• The Spider-Man Themed Kunai Throwing Knife Set: These are substantial 8” throwers featuring a black stainless steel blade and handle, with spider design on near the handle

• Z-Hunter Zombie Apocalypse: These feature a double-edged silver cutting edge with a black painted blade. At 7.5” they provide the perfect balance between length and weight. 

How to Throw a Kunai

Unlike balanced Western throwing knives, Kunai knives are often slightly handle-heavy due to their pommel ring.

1. The Grip: hold the handle (the cord wrapped section) firmly with your thumb on the spine
2. The Stance: step forward with your on-dominant foot
3. The Stick: Aim for a “no-spin” or “half-spin” throw for distances under 10 feet

Conclusion

Whether you are looking for a Kunai dagger for display or a set of Japanese throwing knives for backyard target practice, the most important factor is quality materials.

Don’t settle for plastic, and experience the history and the sport of Kunai throwing with real stainless steel.

Looking for real Japanese kunai throwing knives to add to your collection? Browse our selection at Frontier Blades.