Munetoshi Viper Unokubi 1075 Spring Steel Katana Sword
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Munetoshi Viper Unokubi 1075 Spring Steel Katana Sword

2.85 LBS
Free Shipping

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Product Description

The Munetoshi Viper has a very unique geometry and is one of the best handling swords we offer. Featuring an Unokubi-zukuri style geometry, there are two bohi (grooves), and about 1/3 up the blade, the geometry changes into a diamond cross section. The combination of the grooves and diamond cross section gives an exceptionally light sword. Coming in at only 2lbs, this sword was designed to cut light targets with ease and is fully capable for use in tameshigiri. The extremely tough blade will not easily bend or take a set due to the superior heat treatment of the steel. This is a unique katana with rarely seen geometry, extreme light weight, superior heat treatment, and great handling.

Viper Geometry

The Unokubi-zukuri geometry stems from a naginata blade which is then cut down and turned into a katana or wakizashi.

When the basic shape of the naginata is elongated to fit more closely to a standard katana shape, you are left with a sword that has extremely lively handling.

The complex geometry is not just for show, it is also a highly engineered and well-thought-out design that improves the weight distribution, handling, and durability.

Performance characteristics

- Specially made 1075 Spring Steel and superior heat treatment make this sword extremely durable and does not easily bend or torque.

- Weight distribution: Great weight distribution where the sword is very easy to maneuver and does not strain the joints.

- Made to cut light targets such as bottles, paper and tatami omote.

Blade: The blade of the Unokubi sword has been constructed from through hardened special alloy 1075 carbon spring steel in a unokubi-zukuri style with naginata-bi. The blade comes full tang, very sharp, and is fully capable of performing tameshigiri.

Saya: The saya of the sword is wooden with a black semi-gloss finish and buffalo horn koiguchi. The sageo is red/black chemical fiber tied over a wooden kurigata with golden shitedome.

Tsuka: The blackened steel tsuba is a sukashi cut-out design. The fuchigashira are blackened patterned alloy with a vine theme. The ito is red cotton with tight alternating crossovers over black lacquered samegawa. Two smoked bamboo mekugi secure the tang of the sword into the tsuka.

Note: Sword stand sold separately.

Overall Length: 39.5 "

Nagasa Length: 28 "

Tsuka Length: 10.5 "

Point of Balance: 4.75 "

Sori: 0.7 "

Weight W/O Saya: 1.95 lbs

Tsuba Material: Steel

Blade: Sharp

Blade Material: Special Alloy 1075 Spring Steel

Ito: Cotton

Sageo: Thick Synthetic Fiber

Fittings: Blackened Brass

Mekugi: Double Pinned Bamboo

Condition: Brand New

2 Reviews

  • Looking for a lightweight trick katana?

    Posted by Eric B on Oct 10th 2017

    Then look no further. Very well thought out sword. As close to perfect as a production katana can get. Tight ito, great saya fit, and razor sharp. Came sharper than the 6 other namebrand, more expensive katana/wakizashi I own. No complaints whatsoever. Will definitely be purchasing another Munetoshi in the future. Great customer service too.

  • Great product, even better customer service!

    Posted by Ryan McDevitt on Jul 28th 2017

    The Viper is an amazing sword. I love the sound it makes when a proper swing is made. Its super light and agile, I can whip this thing around like no tomorrow. Shipping to Canada was fast like in other reviews. I emailed back and forth with the company, really great people and super helpful. I'm confident in ordering from them again!

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Shipping & Returns

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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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