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How to choose your Iaito

Information on choosing your Iaito Size, Model & Options

Unlike for Dogi, Hakama, or Obi, the use of poor quality material to manufacture Iaito can be dangerous and lead to serious injuries. Seido is very attentive to safety and our Iaito are especially selected for their high quality.

Contrary to a popular belief in the West, steel Iaito do not exist in Japan. The possession of weapons is strictly prohibited by law and owning a steel weapon is only possible with a legal circumvention that categorizes the Katana as an art object, not as weapon. The very restrictive law, even for those owning a real steel Katana, and considering its price, the vast majority of practitioners tends to use Iaito. Iaito are usually made of aluminum/zinc alloys, which can be produced via different processes. The Minosaka blades are manufactured through a proprietary process that yields a high quality, "bubble-free" alloy.

The first thing to determine when choosing a Iaito is your type of practice. Will you seldom use your Iaito? Do you use it in every class? What type of Budo do you practice?

Beginners and casual weapons practitioners will opt for low-cost but reliable material which is found in the Tokusei or Jidai Koshirae Iaito models. More seasoned practitioners and collectors will opt for the superior Higo Koshirae. High level practitioners will also appreciate heavy-weight models such as the Hon Koshirae. Please note that Iaito that are heavy and difficult to handle, should be reserved for experienced practitioners.

The weight of the Iaito depends on the blade, Tsuka length, and options

How to determine the correct size

The blade length is usually determined by the size of the practitioner.
Be careful though: depending on schools and teachers, the recommendations may vary slightly to what we suggest in this table. In general, for Aikido practitioners for whom the Noto (sheathing the sword) does not seem crucial, we advise to opt for a Iaito that is 0.5 Shaku shorter than what is suggested in the table.

The blade lengths are given according to the size of the practitioner and following the guidelines suggested by the Japanese Iaido Federation. The Tsuka lengths are suggested by our team so as to conserve the balance of the weapon, but also taking into account the fact that the hands of western practitioners are generally bigger than those of the Japanese.

The following table does not take into account the weight variations that occur when choosing Tsuba and Menuki.

Size Table & Weight

Your size Blade

Tsuka Recommended Lenght

Standard Weight Iaito
[without Saya]
Heavy Weight Iaito
[without Saya]
~ 150 cm 2.20 shaku / 66.6 cm 8 sun / 22.4 cm 670 g 850 g
~ 155 cm 2.25 shaku / 68.2 cm 8 sun / 22.4 cm 700 g 880 g
~ 160 cm 2.30 shaku / 69.6 cm 8.5 sun / 25.8 cm 720 g 910 g
~ 165 cm 2.35 shaku / 71.2 cm 8.5 sun / 25.8 cm 750 g 940 g
~ 170 cm 2.40 shaku / 72.7 cm 8.5 sun / 25.8 cm 780 g 970 g
~ 175 cm 2.45 shaku / 74.2 cm 9 sun / 27.3 cm 810 g 1000 g
~ 180 cm 2.50 shaku / 75.8 cm 9 sun / 27.3 cm 840 g 1030 g
~ 185 cm 2.55 shaku / 77.3 cm 9.5 sun / 28.7 cm 870 g 1060 g
~ 190 cm 2.60 shaku / 78.8 cm 9.5 sun / 28.7 cm NA 1100 g
~ 195 cm 2.65 shaku / 90.3 cm 10 sun / 30.7 cm NA 1140 g
~ 200 cm 2.70 shaku / 81.8 cm 10 sun / 30.7 cm NA 1180 g

Standard weigth blades have a maximum of 2.55 shaku and heavy blades a maximum of 2.70 shaku.
Standard models are available up to 2.45 and 2.55 shaku, however, deluxe models are available up to 2.55 and 2.70 shaku (mounted accordingly to compensate the structural weakness of longer blades).

More information on available options

Click on the "open" buttons to display the details.

Blade Hamon

The Hamon on the Iaito is for purely aesthetic reasons and has no effect on the usage of the weapon.
On Shinken (Katana), it results from selective quenching, and its quality depends heavily on the forge.
The Iaito being made of aluminum, it cannot be sharpened, the Hamon is made by sanding it using a stencil. In the same category of Hamon (e.g. Notare, Midare), the workshop has dozens of stencils, all slightly varying, so that there are very few identical Hamon.

Sugaha Hamon Notare Hamon Midare Hamon Gunome Hamon

Habaki & Seppa

The color and finish of the Habaki and Seppa are purely decorative.
The Habaki are proposed in 3 models: Muji (plain), Shonai, and Yujo.
While conventional models are made of raw copper, "deluxe" Habaki and Seppa models are offered with gold and silver plating.

Shonai Muji Yujo Copper Habaki Shonai Muji Yujo Silver Habaki Shonai Muji Yujo Gold Habaki Seppa


The quality of the Tsukasame (ray skin) has a significant influence on the quality of the grip and it can be made in white or black. Its color is of course, only for aesthetic purpose.


Tsukaito & Sageo

The Tsukaito and the Sageo are available in cotton for the classic models and in silk for the deluxe models.
Cotton has the advantage of a better sweat absorption but is however, less durable than the silk.


Fuchi & Kashira

The Fuchi and Kashira are two pieces that complete the Tsuka, the handle of a sword. The Fuchi is the collar and the Kashira the butt of the handle.They are made from aluminum, brass, copper and iron, the finish itself is only for decorative purpose.

Fuchi & Kashira dimensions and material
Picture Code Name Related
Description Fuchi
Ryu (Dragon) Fuchi Kashira FK100 Ryu Tokusei
Dragon 3.9
Sakura (Cherry blossom) Fuchi Kashira FK101 Sakura Tokusei
Cherry blossom 3.8 cm 2.2 cm 1.1 cm 3.5 cm 1.8 cm 1.2 cm Brass
Higo Icho Fuchi Kashira FK103 Higo Icho Higo Zogan
Higo is a province in south Japan, Icho means Ginko and Zogan refers to a technique of inlaying gold or silver on metal. 4.0 cm 2.3 cm 1.1 cm 3.5 cm 1.8 cm 1.3 cm Iron
Higo Nami Fuchi Kashira FK104 Higo Nami Edo Higo
Higo is a province in south Japan, Nami means wave and Edo refers to the Edo period. 4.1 cm 2.3 cm 1.4 cm 3.6 cm 1.7 cm 1.3 cm Brass
Higo Karakusa Fuchi Kashira FK105 Higo Karakusa Higo
Higo is a province in south Japan, Karakusa refers to the arabesque pattern. 4.1 cm 2.3 cm 1.0 cm 3.5 cm 1.8 cm 1.6 cm Brass
Yagyu Kasumi Fuchi Kashira FK106 Yagyu Kasumi Yagyu
Yagyu is a famous Samurai / clan, typically edged shapes in sword designs. Kasumi means mist. 4.0 cm 2.2 cm 1.1 cm 3.5 cm 1.7 cm 1.0 cm Brass
Higo Nawa Fuchi Kashira FK108 Higo Nawa Toppei
Higo is a province in south Japan, Nawa means cord. 4.2 cm 2.3 cm 1.1 cm 3.5 cm 1.8 cm 1.3 cm Brass
Guribori Fuchi Kashira FK110 Guribori Hon Jidai
Guribori is a traditional tendril motive. 4.1 cm 2.5 cm 1.2 cm 3.7 cm 2.0 cm 1.1 cm Brass
Higo Ishime Fuchi Kashira FK111 Higo Ishime Shinto Higo
Higo is a province in south Japan, Ishime means stone pattern. 4.0 cm 2.1 cm 0.95 cm 3.5 cm 1.8 cm 1.1 cm Iron
Higo Yukibana Fuchi Kashira FK113 Higo Yukibana Koto
Higo is a province in south Japan, Yukibana meaning snowflake. 4.0 cm 2.3 cm 1.3 cm 3.6 cm 1.7 cm 1.8 cm Iron
Higo Icho Karakusa Fuchi Kashira FK118 Higo Icho Karakusa Kanesada
Higo is a province in south Japan, Icho means Ginko and Karakusa refers to the arabesque pattern. 4.0 cm 2.3 cm 1.1 cm 3.5 cm 1.7 cm 1.3 cm Iron
Higo Guribori Fuchi Kashira FK120 Higo Guribori Dotanuki
Higo is a province in south Japan, Guribori is a traditional tendril motive. 4.3 cm 2.6 cm 1.6 cm 3.7 cm 2.0 cm 1.7 cm Brass


The Tsuba has two main functions: aesthetic and balance adjustment.
A heavy Tsuba shifts the balance towards the Tsuka, making the Iaito easier to handle whereas a light Tsuba will push the balance towards the Kissaki (choose the latter if you decide to focus on cutting training).
You will find below some photos of all our Tsuba but also details on the size, material, and weight.

Tsuba Detailed measurements

Picture Name Descprition Height Width Thickness Weight Material
Washi (Eagle) Tsuba Washi Eagle 7.5 cm 7 cm 4.1 mm 136 g Wrought iron
Yagyu Tsuba Yagyu Name of a famous Samurai clan 7.5 cm 7.3 cm 5.3 mm 123 g Copper
Shippo Tsuba Shippo The 7 treasures (gold, silver, pearls, agate, crystal, coral, lapis lazuli) 7.4 cm 7 cm 4.1 mm 135 g Wrought iron
Hanjiro Tsuba Hanjiro Famous Samurai 7.9 cm 6.5 cm 6 mm 142 g Copper
Umedata Tsuba Umedata Famous blacksmith from the Edo period. 8.4 cm 7.5 cm 4.3 mm 150 g Wrought iron
Hyotan (Gourd) Tsuba Hyotan Gourd (calabash) 7.1 cm 7 cm 5 mm 126 g Copper
Musashi Tsuba Musashi Famous samurai 7.4 cm 7.4 cm 7.1 mm 146 g Copper
Kasuga Tsuba Kasuga Spring sun. Name of a place. 8.4 cm 7.6 cm 4.1 mm 138 g Wrought iron
Ameryu (Dragon under Rain) Tsuba Ameryu Dragon under the rain. 8.1 cm 7.7 cm 4.1 mm 147 g Wrought iron
Namako (sea cucumber) Tsuba Namako Holothuroidea (sea cucumber) 7.4 cm 6.9 cm 4.1 mm 90 g Wrought iron
Muji Tsuba Muji plain (no pattern) 7.4 cm 6.9 cm 4.1 mm 134 g Wrought iron
Kagecho (Butterfly shadow) Tsuba Kagecho Butterfly shadow 7.4 cm 7.2 cm 5 mm 106 g Copper
Nami (Wave) Tsuba Nami Wave 8.1 cm 7.7 cm 4.1 mm 145 g Wrought iron
Hirata Tsuba Hirata Famous Edo period Samurai 7.6 cm 7.2 cm 4.5 mm 120 g Copper
Higo Tsuba Higo Province in South Japan (now Kumamoto) 7.5 cm 7.1 cm 4.1 mm 90 g Wrought iron
Shin-Umetada Tsuba Shin-Umetada Famous blacksmith of the Edo period (shin means "new"). 8.5 cm 7.6 cm 4.1 mm 165 g Wrought iron
Mokko Kuyomon Tsuba Mokko Kuyomon Refers to the small drawing on the lower right part of the Tsuba, a Buddhist symbol representing "The 12 Principles of nine planets." "Mokko shape". 7.6 cm 7.9 cm 4 mm 124 g Wrought iron
Maru Kuyomon Tsuba Maru Kuyomon Refers to the small drawing on the lower left part of the Tsuba a Buddhist symbol representing "The 12 Principles of nine planets." "Rounded shape". 7.8 cm 7.7 cm 4.1 mm 136 g Wrought iron
Icho Zogan Tsuba Icho Zogan Icho means Ginko and Zogan refers to a technique of inlaying gold or silver on metal. 8.4 cm 7.7 cm 4.1 mm 141 g Wrought iron


Although the Menuki influence the balance of the weapon, it is very subtle given its light weight. It can be desirable however, to choose a heavy Menuki in order to slightly shift the weight towards the Tsuba (and vice versa).

Menuki Detailed measurements

Menuki dimensions and material
Picture Name Description Length Width Material
Hishi (Water caltrop) Menuki Hishi Water caltrop (or devil pod) - aquatic plant 1.5 cm 3.4 cm Aluminium
Sake (Salmon) Menuki Sake Salmon 1.4 cm 4.5 cm Copper
Kenmakiryu (Dragon entwining a sword)  Menuki Kenmakiryu Dragon entwining a sword 0.9 cm 6.8 cm Aluminium
Tombo (Dragonfly) Menuki Tombo Dragonfly 1.3 cm 3.9 cm Aluminium
Sakura (Cherry Blossom) Menuki Sakura Cherry blossom 1.1 cm 1.1 cm Aluminium
Ryu (Dragon) Menuki Ryu (sho) Dragon (small) 1.1 cm 3.8 cm Copper
Ryu (Dragon) Menuki Ryu (dai) Dragon (large) 1.1 cm 5.3 cm Copper
Tsukushi (Horsetail) Menuki Tsukushi Horsetail 0.6 cm 5.8 cm Copper
Botan (Peony) Menuki Botan Peony 1.2 cm 5.4 cm Copper
Hitsuji (Lamb) Menuki Hitsuji Lamb 1.1 cm 2.7 cm Copper
Kenkatabami (Oxalis montana on two swords) Menuki Kenkatabami Oxalis montana, (a herb, also called mountain wood-sorrel) on two swords 1.6 cm 4.9 cm Bronze
Mukade (Centipede) Menuki Mukade Centipede NA cm NA cm Copper
Kuyomon Menuki Kuyomon Buddhist symbol representing "The 12 principles of the 9 planets" 1.5 cm 4.5 cm Bronze
Ebi (Shrimp) Menuki Ebi Shrimp 1.1 cm 7 cm Aluminium


The coating protects the Magnolia wood of which the Saya is made of. Even though the lacquering has no influence on the practice, we generally advise to choose "Ishime" (Kuroishime, Chaishime) as it those are more resistant to scratches.
The differences between the "Chaishime", "Kuroshime", and "Hon Chaishime" coatings reside in the number and thickness of the layers applied. The "Hon" (meaning "real" in Japanese) models are composed of more layers and therefore, the processing time is longer than that of the classic models. The same applies to all deluxe Saya with complex lacquering.


Taking care of your Iaito

Unlike steel Shinken (Katana), Iaito require only minimal maintenance. It is not absolutely necessary to oil the blade because it does not rust. However, regularly applying oil is advised to feed the wood of the Saya.

Please be careful to not use Uchiko powder (used for Shinken) as it may cause damage to alloy blades.

Of course, the Iaito should be cleaned with a cloth after each class. Ensuring good maintenance of all parts is essential to keep the Iaito in good condition, to avoid safety issues and hence, injuries.

Check out our reportage at the Minosaka Workshop

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