A Glossary of Sword Blemish Terms: What Fukure, Kitae-ware, and Hike Mean for Value
* Image is for illustrative purposes only.Table of Contents
Why You Need to Know Defect Terminology
When reading Japanese sword certification documents or sales descriptions, you often encounter unfamiliar specialized terms alongside the word "kizu" (defects). Fukure, hike, yake, kitae-ware—these terms all describe various flaws that can occur on the blade, but their meanings and impact on evaluation differ significantly from term to term.
Not all defects significantly diminish a sword's value, but conversely, some defects can be critically damaging. Reading descriptions without understanding what the terms mean can lead to impressions far removed from the actual evaluation. This article organizes the defect terminology commonly used in purchasing and appreciation contexts.
Representative Defect Terminology List
| Term | Reading | Meaning | Impact on Evaluation |
|---|---|---|---|
| Fukure | ふくれ | A defect where air or impurities become trapped between layers during forge welding, causing the surface to bulge or later rupture | Medium to large. Depends on location and size |
| Kitae-ware | きたえわれ | Fine cracks that occur along the forge-lines during the folding and forging process | Medium. Depends on depth and number |
| Hike | ひけ | Fine, shallow scratches that occur during polishing or handling | Small. Often can be reduced with re-polishing |
| Shimi | しみ | Discoloration spots formed by rust or dirt that has adhered to the surface | Small to medium. Depends on the degree of rust progression |
| Yake | やけ | A state where the hamon or jigane has altered due to exposure to fire or high temperature | Large. In most cases, results in a significant reduction in evaluation |
| Hagire | はぎれ | A crack that runs across the boundary of the hamon. One of the most serious defects | Large. Affects the strength of the blade itself |
| Ware | われ | Relatively large cracks in the blade | Large. Can be fatal depending on size and location |
The mechanism by which kitae-ware occurs is detailed in The Causes and Prevention of Kitae-ware, and the detailed origins of defects that appear in the hamon are covered in Hamon Failures and Defects.
"Hataraki": Confused with Defects——Not a Flaw
A phenomenon that beginners often mistake for defects is what is called "hataraki" (figuring/activity) that appears in the jigane and hamon. Phenomena such as kin-suji (golden lines), suna-nagashi (sand streaks), and chi-kei (ground patterns) are all natural patterns that occur during the forging and hardening processes, and in many cases are treated as elements that enhance evaluation.
The key point in distinguishing between defects and hataraki is whether it creates a structural weakness in the blade. Hataraki appears as linear patterns as part of the expression of the jigane or hamon, whereas defects are in many cases structural flaws caused by poor forge welding or external impact. Understanding this difference greatly increases the accuracy with which you can interpret the descriptions in certification documents.
How to Think About the Impact of Defects on Evaluation
The impact of defects on evaluation is not determined simply by "whether there is a defect or not." In practice, the following perspectives are comprehensively considered.
- Location: Defects in the hamon tend to have greater impact on evaluation than defects in the jigane portion
- Size and number: Evaluation differs between a single small defect and defects in multiple locations
- Possibility of progression: The treatment differs depending on whether the defect is fixed in its current state or has the potential to expand in the future
- Balance with rarity: For rarer swords such as signed works by renowned sword makers, the overall evaluation may not drop significantly even if there are some defects
As covered in Japanese Sword Price Appraisal Standards, the final evaluation is determined by combining multiple elements such as signature, period, and condition, and value cannot be discussed by isolating only the presence or absence of defects.
Checkpoints When Viewing and Examining the Actual Sword
It is often impossible to fully grasp the reality of defects from photographs and descriptions alone. If you have an opportunity to view the actual sword, understanding will deepen if you examine it from the following perspectives.
- Trace the hamon by changing the angle of light: Fukure and hagire may only be noticed for the first time by viewing the hamon's continuity with light applied at an angle
- View the entire jigane as a surface: Shimi and yake often appear not at a single point but as color tone irregularities across the entire jigane
- Check the boundary between the nakago and blade: Kitae-ware tends to occur near the edge section and spine section, so observe this boundary carefully
If you find a suspicious area, it is desirable not to draw conclusions based on your own judgment, but rather to compare it with the contents of the certification document and the seller's explanation, and if necessary, adopt an attitude of seeking additional explanation.
Summary——Knowing the Terms is the First Step to Reading Certification Documents
By understanding each defect term one by one, you will be able to read the information written in certification documents and sales descriptions not simply as a list of specialized terms, but as information that specifically shows the condition of the sword. With the premise that not all defects carry the same weight, developing a habit of confirming details with the seller if there is anything of concern will lead to finding a sword that you are satisfied with.
