Katana - Japan

Japanese Naval Katana Minatogawa Shrine Tadayoshi NBTHK Hozon
Izumo-jū Kawashima Tadayoshi (1st Generation) 

A  naval Minatogawa Shrine blade by the 1st generation Kawashima Tadayoshi, ranked Jō-saku among his works and Saijō Ō-waza for cutting ability. Forged in the wartime period and preserved in shirasaya, this sword combines powerful presence with exceptional historical importance  it is understood to be a special shrine sword made when Tadayoshi was invited to Minatogawa Shrine to demonstrate his skill, making it effectively a one-of-a-kind masterpiece in his works.

About the 1st Kawashima Tadayoshi

The first Kawashima Tadayoshi was a highly regarded gendaitō smith from Shimane, working before, during and after the Pacific War. His real name is recorded as Kawashima Zenzaemon, born in May 1892.

He forged traditional, fully hand-made blades during the war and continued his craft in the postwar period. According to NBTHK-papered examples and dealer research, after the war he entered sword exhibitions, won many prizes, and was eventually elevated to the rank of Mukansa swordsmith, meaning his works were judged to be beyond ordinary competition level and accepted without critique.

Blades by the 1st Tadayoshi are especially appreciated for:

Dense, refined ko-itame hada with a very clean, traditional appearance

Bright, powerful nie-based hamon (both suguha and midare styles), with well-defined ashi giving excellent cutting characteristics

Strong, well-balanced shapes suited to actual use – wide bodies, good sori, and confident kissaki work

The description of Saijō Ō-waza cutting ability underlines that his swords belong to the very highest class of cutting performance  a term derived from the famous wazamono cutting rankings, where Saijō Ō-wazamono denoted blades capable of exceptional tameshigiri results. Wikipedia+1

Seen against this background, a Minatogawa Shrine invitation sword by Tadayoshi is not only rare, but also a showcase of a smith whose skills were later formally recognized at the top level of modern Japanese swordmaking.

Swordsmith & Rank

Signature: 出雲住忠善作 – Izumo-jū Tadayoshi saku (1st Generation)

Name: Kawashima Tadayoshi (1st generation)

Origin: Shimane Prefecture (Izumo)

Rank:

Work ranking: Jō-saku within the body of 1st gen Izumo-jū Tadayoshi’s works.

Cutting ability: Saijō Ō-waza (“highest great cutting skill” class)

Minatogawa Shrine & Historical Significance

This sword carries on the back of the tang (mune) the naval Minatogawa Shrine mark, indicating that it was forged under the auspices of Minatogawa Jinja, the shrine established by the Imperial Japanese Navy in Kobe to produce high-class gendaitō for naval officers and presentations.

According to the accompanying information, Tadayoshi was specially invited to Minatogawa Shrine to forge this blade as a shrine sword to demonstrate his ability 1941/1943. For a smith normally based in Izumo, being called to the Navy’s own shrine forge is an exceptional honour. Combined with:

The Minatogawa Shrine inscription

The invitation/demonstration context

And his later status as a Mukansa master

this blade stands out as a unique piece with strong historical significance.

While army Yasukuni-tō are encountered relatively often, naval Minatogawa swords are few, and many were lost at sea with their owners. Within that already tiny group, an invited shrine sword by Kawashima Tadayoshi is truly special , a sword that connects frontline naval history, the Minatogawa shrine program, and the career of a top-rank modern smith.

Blade Description

Era: Wartime period.

Shape:
A healthy, powerful tachi/katana with:

Wide body and preserved ubu-ha (unsharpened area near the tang)

Thick kasane

Deep curvature (sori)

Extended kissaki

The overall sugata gives a strong, well-balanced, clearly martial impression, very much in line with the best Yasukuni/Minatogawa-related gendaitō.

Jigane:

Finely worked ko-itame hada,

Forming a refined, tight steel with a traditional appearance.

Hamon:

Nie-based gunome-midare flowing from hamachi to yokote

Well-developed ashi stepping into the ji

Boshi in gentle notare, rounded and turning back neatly

The hamon is bright, lively and confident  exactly the sort of yakiba one expects from a Saijō Ō-waza-class swordsmith.

Nakago (Tang):

Ubu, with one mekugi-ana

Omote: Izumo-jū Tadayoshi saku

Mune: Minatogawa Shrine naval mark confirming its special provenance

Mounting:

In plain shirasaya for preservation and study

Habaki: Single plain copper habaki

Specifications

Blade length (nagasa): 64.4 cm (25.35")

Curvature (sori): 1.4 cm (0.55")

Motohaba (width at base): 3.26 cm (1.28")

Sakihaba (width at yokote): 2.16 cm (0.85")

Kasane (thickness): 0.69 cm (0.27")

Mekugi-ana: 1

Weight (bare blade): 745 g

Habaki: Single plain copper

Mounting: Shirasaya
1941/1943

Certification

NBTHK Hozon Token  officially recognized as a genuine and worthy Japanese sword.

For an advanced collector of Yasukuni- and Minatogawa-related gendaitō, this is not just a fine wartime blade but a one-of-a-kind Minatogawa Shrine invitation sword by 1st generation Kawashima Tadayoshi  uniting rarity, top-class craftsmanship, and powerful naval history in a single piece.
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This is one unique Miniatogawa Shrine sword the only one in its existence.