Iaido, Kendo, Naginata: Choosing Practice Swords and Maintenance for Different Training Stages

Choosing Your Modern Martial Art Training: Comparison of Iaido, Kendo, and Naginata with Equipment Selection

In modern Japan, traditional martial arts involving swords are actively practiced in multiple forms. The most representative of these are three types: "iaido," "kendo," and "naginata." These martial arts commonly require consideration of sword maintenance and selection according to the practitioner's level.

This article comprehensively explains appropriate training choices by stage of practice, selection criteria for swords used in each martial art, and maintenance practices.

Characteristics of Iaido and Equipment Selection

Iaido is a martial art involving repeatedly drawing the sword from its sheath and facing an imagined opponent. It is known as the martial art where practitioners "grip the sword most frequently in actual practice." A characteristic of this martial art is that the relationship between the blade and scabbard is critically important in the series of drawing movements. The friction during drawing, the sound and feel when sheathing, the movement of the blade within the scabbard—all of these affect the quality of training.

For beginners in iaido, it is common to start with wooden swords (bokuto) or bamboo swords (shinai) rather than real swords (shinken). Some dojos use sharpened practice swords for demonstration purposes. Beginners are not recommended to use real swords for safety reasons. Wooden swords are light and easy to handle, making them suitable for learning basic movements.

Intermediate and advanced practitioners are expected to possess real swords. At this stage, either new swords forged by sword craftsmen or practical single-ridge construction swords procured from the market are chosen. Due to the nature of iaido, strength to withstand repeated drawing and a design suitable for re-sharpening are prioritized. The weight, length, and curve of the sword greatly influence training progress. Generally, a blade length of approximately 70–75 cm is standard.

Maintenance is particularly important in managing humidity within the scabbard. Since iaido practitioners frequently draw the sword, moisture tends to accumulate in the scabbard, making regular oiling (blade preservation) essential for rust prevention. Additionally, cleaning dust from the scabbard is a basic maintenance task that should be performed at least monthly. Re-sharpening is also necessary approximately once a year.

The World of Kendo: Bamboo Swords and Training Environments

Kendo is a martial art that uses bamboo swords and does not use real swords. Therefore, in the context of equipment selection, "bamboo sword quality" is the primary consideration. The material, manufacturing method, weight, and other factors of the bamboo sword greatly influence training quality and safety. Bamboo sword selection varies depending on height, build, and stage of training. Bamboo swords for adult males are generally about 115 cm in length.

The option of real swords is generally unnecessary in the context of kendo. However, those studying traditional forms of swordplay or practicing iaido in parallel may separately consider obtaining a real sword.

For kendo practitioners, the challenge is the durability and maintenance of bamboo swords. Bamboo swords regularly crack and splinter, requiring frequent replacement. As maintenance for wooden equipment, regularly performing humidity control and polishing can extend their lifespan. Bamboo sword re-wrapping also needs to be performed regularly. With frequent training about once a month, bamboo sword durability is generally in the 3–6 month range.

Naginata: Handling Long-Handled Weapons

The naginata is a weapon with a blade attached to a long shaft and has different physical characteristics from iaido and kendo. Naginata practitioners must pay particular attention to the maintenance of the junction between the shaft and blade. Looseness in the shaft can lead to accidents during use, making it important to check after each use. The naginata is generally about 240 cm in total length, a very long weapon.

Practitioners from beginner to intermediate levels often use practice naginata provided by the dojo. As training progresses to more advanced levels, more people purchase privately owned naginata. With personally owned naginata, the practitioner themselves bears maintenance responsibility.

The majority of naginata blades do not use real swords; however, real blades may be used for classical martial arts or demonstration purposes. In that case, the maintenance burden is equal to or greater than that of iaido.

Sword Selection Strategy by Stage of Training

The equipment to be chosen differs greatly depending on the stage of training. Beginners typically start with bamboo or wooden swords, but as training progresses, they come to possess real swords.

In the beginner stage, safety is the top priority. Using wooden or bamboo equipment minimizes accident risk. At intermediate level and above, understanding the characteristics of actual swords and performing proper maintenance are required.

Advanced practitioners purchase new swords from sword craftsmen or acquire carefully selected swords from the market. At this stage, knowledge about sword quality and characteristics becomes extremely important.

Unified Understanding of Maintenance Practices

Across all three martial arts, the basics of maintenance are shared. The three fundamentals are blade preservation, scabbard management, and handle inspection.

• Oiling: Rust prevention for the blade. Aim for once or twice monthly
• Re-sharpening: Blade edge repair. Approximately once a year (depending on frequency of use)
• Scabbard cleaning: Removal of moisture and dust from within the scabbard. Regularly
• Handle inspection: Check for looseness and wrapping damage. After each use

Regular oiling is essential for rust prevention. A frequency of once to twice monthly is recommended. Re-sharpening should be done approximately once per year, depending on frequency of use.

Advice for Modern Beginners

For those beginning martial arts in modern Japan, "which martial art to choose" is directly connected to "how much sword investment will be necessary in the future."

If budget is limited, starting with kendo keeps costs within the range of bamboo swords. If you wish to learn actual blade handling, iaido is optimal. If interested in classical martial arts or demonstrations, naginata and classical forms of practice are also options.

Conclusion

The three martial arts of iaido, kendo, and naginata require different approaches in sword selection and maintenance practices. Practitioners must consider their own goals and budget, as well as long-term commitment, and equip themselves with appropriate equipment and knowledge.