Posts Tagged ‘Tiger Claws’

Traditional Ninja Weapon Design – Part 2: Shuko

Monday, August 10th, 2009

Today, I thought I’d move on to part two of my series on traditional Ninja weapon design, featuring the work of Matthew Wright of Nine Directions. And the topic of today’s post will be the infamous Ninja Shuko or “Tiger Claws”:

Ninja Shuko

Ninja Shuko

Ninja Shuko, which I posted a little bit about before, are interesting weapons. Or more accurately, interesting tools. Although they can be used as weapons, much like the Kunai I posted about last week, and are most commonly used as climbing tools, some believe that shuko were also descended from farm implements. As Matthew suggests on his site, there are those who believe that shuko were originally created by farmers to ease carrying hay bales and such.

However there is little evidence to either support that hypothesis. And given the difficulty and cost of constructing shuko, I highly doubt the hay bale carrier theory, since the Japanese were much more the practical field expediency type back then, and I think it would have been easier to just use more rope to carry those bales around, than to fashion something as relatively complex as shuko… 🙂 But I digress.

Again, Matthew has employed a very traditional shuko design; a large oval steel hoop, with spikes embedded in it, connected to a large steel arm ring using a leather strap. At the hoop end, the strap is riveted above the spikes, covering the base of the spikes, protecting the hand, and providing a relatively soft internal surface for the hand.

Ninja Shuko - Hand Claws

Ninja Shuko - Hand Claws

The leather strap is also riveted to the very traditional a large steel arm ring, instead of the modern day nylon webbing and velcro wrist strap versions that are floating about all over the place. Now to be honest, while the traditional design works, I tend to favor the modern designs when it comes to practicality. Not necessarily how the spikes and claws are set up, but rather in the overall ergonomics of the arm/wrist hoop design.

Shuko - Steel Hoop

Shuko - Steel Hoop

For one thing, as a climbing device, having an adjustable wrist/arm retention system seems like it would be better than a fixed size steel hoop. So if I were designing something like this, that leather strap riveted to the spike band would be connected to another leather strap that went around the wrist, and was fastened using a buckle, or other similarly secure fastener that could be adjusted and tightened.

To some degree, I think this design would allow you to rest some your weight on the wrist strap during climbing, which could allow temporary stress relief on the muscles of the hand during extensive climbing exercises. But it would really depend on your climbing technique. The mechanical characteristics of shuko suggest that it would require a lot of hand and wrist strength to use, so the benefits of that design modification would vary from person to person.

Shuko - Grip

Shuko - Grip

And another thing is that, it is generally easier to grip something that is not the full width of your hand. If you can wrap your fingers around it, it is much easier to get a firm grip. As you can see from the pic above, this design unfortunately does not let you do that. This is not a problem with modern day designs, which are much narrower and fit the hand much closer.

It is, however very much in keeping with traditional design, which as I mentioned in the previous ninja weapon post, does seem to rely on overly large hoops and very thick components, primarily, I believe, to counteract the low quality of the materials traditionally used. So from a traditional standpoint, these are a quite accurate, functional and beautiful design. Definitely a collectors item.

And since he hand-makes these, I’m sure, if you asked nicely, you could convince Matthew to make a pair to whatever specifications you’d like… 😀

Traditional Ninja Shuko – [Nine Directions]

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