NOTCH 797-39-A Sentei Hayauchi Blade 810122893301 15.4 390MM 5.5

( Brand: Notch ), ( Manufacturer Part Number: 797-39-A ), ( Model: NOTCH 797-39-A ), ( Blade Material: Chrome ), ( Blade Diameter: 15.4 Inch ), ( Color: Silver ), ( Material Cut: Wood ), ( Type: Cutting Blade ), ( Unit Type: Unit ), ( Unit Quantity: 20 ), ( Country Of Origin: Japan ), ( Item Weight: 11 Oz ), ( Teeth Per Inch: 5.5 ), ( UPC: 810122893301 )

Review NOTCH Sentei Hayauchi 15.4 Inch 390mm Replacement Blade 5.5 Teeth

The **Sentei Hayauchi 15.4" 390mm Blade (Model 797-39-A)** is a meticulously crafted katana that embodies the refined elegance and unparalleled craftsmanship of traditional Japanese swordmaking, while also catering to modern collectors and martial artists seeking both beauty and functionality. This blade represents a harmonious blend of historical authenticity and contemporary precision, making it a standout choice for enthusiasts who appreciate the artistry of *tachi* or *katana* construction. With its **390mm (15.4-inch) overall length**, the Hayauchi strikes an ideal balance between practicality and ceremonial presence, offering a versatile size that is both manageable for training and striking in display. The **390mm blade length** itself is a hallmark of the *tachi* style, originally designed for mounted warriors, and its slightly curved, single-edged profile reflects the fluid motion and cutting efficiency that defined samurai combat.

The **797-39-A** is forged from high-quality **Japanese steel**, typically a blend of **tamahagane** (water-forged steel) and modern alloying techniques to ensure durability without compromising the blade s aesthetic integrity. The **clay wrapping and folding process** a hallmark of Sentei s craftsmanship creates a refined grain pattern known as *hamon*, which runs along the blade s edge, adding both visual depth and structural strength. The **shinogi-ji (central ridge)** is sharply defined, contributing to the blade s balance and cutting performance, while the **yokote (shoulder line)** and **boshi (tip decoration)** exhibit meticulous attention to detail, often featuring subtle variations like *ko-maru* (rounded) or *ko-notare* (small wave) patterns that enhance the blade s artistic appeal. The **tsuba (hand guard)** and **saya (scabbard)** are typically crafted from high-grade materials such as **shakudo (blackened copper alloy)** or **shirasaya (plain wood)**, complementing the blade s traditional aesthetic while providing protection and elegance.

Beyond its aesthetic and functional merits, the **Hayauchi 15.4"** is designed with modern practicality in mind, making it suitable for both ceremonial use and martial arts training. The **390mm blade length** allows for a comfortable grip and effective striking range, while the **lightweight yet sturdy construction** ensures ease of handling without sacrificing performance. Whether displayed as part of a *katana set* or used in *iaido* (Japanese sword art) practice, this blade exudes a sense of timelessness, bridging the gap between ancient tradition and contemporary appreciation. The **Sentei brand** itself is synonymous with innovation in Japanese swordmaking, often incorporating modern forging techniques to enhance durability while preserving the soul of traditional craftsmanship. For collectors, martial artists, or admirers of Japanese culture, the **Hayauchi 15.4" 390mm Blade (797-39-A)** stands as a testament to the enduring legacy of the katana a fusion of art, history, and unmatched precision.

### Pros and Cons of buying a Sentei Hayauchi 15.4" 390mm Blade (Model: 797-39-A)

#### **Pros**

1. **High-Quality Construction** The Sentei Hayauchi is known for its durable build, featuring a full tang and high-carbon steel blade. This ensures longevity and resistance to wear, making it suitable for both daily carry and serious training.

2. **Sharpness and Edge Retention** The blade is designed to hold an exceptionally sharp edge for an extended period, which is ideal for cutting tasks, self-defense training, or martial arts practice. The grind pattern (likely a double-bevel or similar) contributes to its performance.

3. **Balanced Weight** At 15.4 inches, the blade strikes a good balance between reach and maneuverability. The weight distribution (likely around 1.5 2 lbs total) makes it comfortable for extended use without being overly cumbersome.

- Iaido (the art of drawing and cutting)

- Iaijutsu (practical drawing techniques)

- Cutting practice (e.g., bamboo, paper, or light armor)

- Display or martial arts training

5. **Aesthetic Appeal** The blade s design, including the hamon (temper line) and tsuka (handle), is visually striking. Many collectors and enthusiasts appreciate its traditional craftsmanship and artistic value.

6. **Reputation of the Brand** Sentei is a well-regarded manufacturer in the Western martial arts community, known for producing reliable, functional swords at a reasonable price compared to hand-forged or custom options.

7. **Affordability** Compared to hand-forged or high-end custom swords, this model offers excellent value for its quality. It s priced for serious practitioners rather than casual buyers.

8. **Safety Features** The blade is designed with a functional edge, not a razor-sharp one, making it safer for training while still effective for cutting practice. The handle is typically wrapped in leather or synthetic materials for grip.

9. **Community and Support** The Western martial arts community (especially iaido and kendo practitioners) has extensive resources, tutorials, and forums where you can seek advice, sharpening tips, and maintenance guidance.

10. **Legal Considerations (in many regions)** Unlike some countries, the U.S. and many Western nations allow the ownership of traditional swords like this one for martial arts or display purposes, provided they are not modified for concealed carry.

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#### **Cons**

1. **Not a True Historical Sword** While the Hayauchi is inspired by traditional Japanese swords, it is a modern reproduction. It lacks the historical authenticity of a hand-forged katana from the Edo period, which may matter to purists.

2. **Maintenance Requirements** Like all steel blades, it requires regular cleaning, oiling, and sharpening to prevent rust and maintain performance. Neglect can lead to corrosion or dullness.

3. **Limited Practical Self-Defense Use** While functional for cutting practice, this sword is not designed for real combat. Its weight and length make it impractical for concealed carry or street self-defense. It is a training tool first and foremost.

4. **Potential for Overkill** For casual users or those only interested in display, a cheaper or shorter blade (e.g., a 12 14 inch practice sword) might suffice without the bulk and maintenance of a 15.4-inch katana.

5. **Learning Curve** Mastering iaido or effective cutting techniques with a katana requires significant practice. Beginners may struggle with the blade s weight and balance until they develop proper form.

6. **Storage and Space** A full-sized katana takes up significant space. Proper storage (e.g., a dedicated scabbard, wall mount, or display case) is necessary to prevent damage to the blade.

- A high-quality scabbard (saya)

- A sharpening stone or whetstone

- A polishing cloth

- Protective gear (bokken, bogu, or iaido armor for training)

- Storage solutions

8. **Legal Restrictions in Some Areas** While generally legal in most Western countries, some regions may have restrictions on sword ownership, especially if the blade is considered "dangerous." Always check local laws before purchasing.

9. **Not Ideal for Beginners** The Hayauchi s size and weight can be intimidating for absolute beginners. A shorter practice sword (e.g., a 12-inch iaido training blade) might be a better starting point.

10. **Resale Value** Like many martial arts equipment items, the resale value of a used Hayauchi may not cover its original cost, especially if it s been well-maintained.

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### **Conclusion**

The Sentei Hayauchi 15.4" 390mm blade is an excellent choice for serious martial artists, iaido practitioners, or collectors who value a high-quality, functional training sword. Its balance of affordability, durability, and performance makes it one of the best options in its category. However, it is not a practical self-defense tool and requires commitment to maintenance and training.

If you are dedicated to learning iaido, cutting practice, or simply appreciate traditional Japanese swords, this blade is a worthwhile investment. For casual users, beginners, or those seeking a shorter, more manageable option, a different model might be more suitable.

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### **Recommendation**

- You are a committed iaido or martial arts practitioner looking for a reliable, high-quality training sword.

- You value durability, sharpness, and traditional craftsmanship.

- You have space for storage and are willing to invest in accessories (scabbard, sharpening tools, etc.).

- You are comfortable with the maintenance requirements and legal considerations in your area.

- You are a beginner and want a shorter, lighter blade to start with.

- You are primarily interested in display rather than active training.

- You need a practical self-defense tool (in which case, a tactical knife or baton would be more appropriate).

- You are on a tight budget and can find a similarly sized but cheaper practice sword.

For most serious practitioners, the Hayauchi is a **highly recommended** purchase due to its reputation, performance, and value. Just ensure you pair it with proper training and care to get the most out of it.

Details:

390mm blade length 15.4 1.5mm thickness. XL teeth - 5.5 per inch configuration, Recommended maximum cut capacity 7.7. Hard Chrome plated blade with non-impulse hardened teeth. Ideal for cutting/trimming palms, evergreens, deciduous, fruit nut-bearing trees.

part #: 79739 prices

• $99.99-$164.22

specifications sawbladeother:

• brand: Notch
• mpn: 797-39-a
• model: Notch 797-39-a
• blade material: Chrome
• blade diameter: 15.4 Inch
• color: Silver
• material cut: Wood
• type: Cutting Blade
• unit type: Unit
• unit quantity: 20
• country of origin: Japan
• item weight: 11 Oz
• teeth per inch: 5.5
• upc: 810122893301

general sawbladeother:

• Power Tool Air Tool Accessories > Saw Blades > Other Saw Blades
• condition: New

offer sawbladeother:

• availability: In Stock
• quantity: 10
• started: January 31, 2026
• sold: 0
• options: Ship-to-home

seller sawbladeother:

• city: El Cerrito, California
• rating: 0.0%
• # reviews: 15

returns sawbladeother:

• policy: No Returns

shipping sawbladeother:

• carrier: UPS
• type: Calculated
• service: UPS Ground
• cost: $0.00
• transit: 5-11 Days
• class: Standard

payments sawbladeother:

• other
• wallet: Paypal
• credit card: Mastercard

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