Japanese Coin Varieties Guide
An in-depth reference to script types, hallmarks, and die varieties of Japanese antique coins — essential knowledge for every serious collector
Why Do Varieties Matter?
In the world of Japanese antique coins, the same denomination can vary dramatically in value depending on script style, hallmarks, and casting location. Kanei Tsuho alone has been classified into hundreds of distinct varieties, and rare die varieties can trade at prices tens or even hundreds of times above common examples.
Collecting by variety — known in Japanese as tegawari (手替わり) — is one of the greatest pleasures of the hobby. Training the eye to spot rarities within a group of seemingly identical coins enables confident market judgments and rewarding discoveries.
Kanei Tsuho — Script Varieties (寛永通宝)
Cast continuously for about 240 years from 1626. Classified into hundreds of varieties by script style.
The standard script form. All four characters — Kan, Ei, Tsu, Ho — are written in their canonical forms. This is the benchmark variety against which all others are measured.
Well-balanced character layout. The dot on 'Ho' (宝) is in its standard position.
The crown dot of the character 'Ho' (宝) flows horizontally in a cursive (sosho) style. Frequently seen on early castings.
The upper dot of 'Ho' sweeps rightward in a cursive stroke.
A variety in which the character 'Ho' tilts upward as if looking up. Rarity changes significantly depending on the combination with reverse (hai) characters.
The entire 'Ho' character leans upward to the right. The 'Bei' (貝) component is especially pronounced.
A distinctive script associated with the Shimaya foundry in Osaka. Characters are thick and powerful in appearance.
All characters are noticeably thick. The horizontal stroke of 'Ei' (永) is especially bold; the shinnyū of 'Tsu' (通) is large.
Cast in Shimotsuke Province (modern Tochigi Prefecture). The reverse often bears characters such as 'Ashi' (足), 'No' (野), or 'Shimo' (下) identifying the mint.
Reverse shows characters such as 足, 野, or 下. Script is slightly slender.
A rare variety in which the sanzui (three-stroke water radical) of 'Ei' (永) is written with only two strokes.
On the left side of 'Ei', only two strokes appear where three are normally present.
A variety in which the character 'Ei' tilts downward, as if bowing.
'Ei' leans diagonally downward to the left.
A variety where the final stroke of 'Kan' (寛) extends downward in an elongated tail.
The last stroke of 'Kan' stretches noticeably downward.
A variety with noticeably smaller characters, caused by mold wear or intentional reduction.
Characters are clearly smaller compared to standard specimens. Wider gap between characters and the inner rim.
A variety with oversized characters that fill the coin's interior. Creates a bold, powerful impression.
Characters nearly touch the inner rim. Appears compact and densely packed.
A variety with deeply incised characters, typically associated with the mother-coin (bosen) lineage. Most often seen in early castings.
Sharp, crisp character outlines. Shadows appear easily under oblique lighting.
A variety with shallow character engraving, common in late-stage castings from worn molds.
Characters appear flat and lack depth. Fine details tend to be indistinct.
Coins bearing characters or symbols on the reverse side that identify the mint or period. Examples include 文, 元, 佐, 仙.
Characters or symbols visible near the center or rim of the reverse. Value varies greatly by reverse type.
Kanei Tsuho cast after 1767 (Meiwa 4). Features a new script style distinct from earlier pieces.
More uniform and regular script overall. Appears more consistent than old Kanei.
Kanei Tsuho cast in iron rather than copper, issued during the late Edo period due to copper shortages. Prone to rusting.
Heavier than copper coins. Attracted to magnets. Frequent rust damage.
How to Identify Varieties
Loupe is essential
Use at least a 10× loupe to examine script details. Script differences are often impossible to distinguish with the naked eye.
Compare to a reference specimen
Keep a benchmark example (such as a Seiji or Honza Chokaku) on hand for direct side-by-side comparison to make differences clear.
Use a catalog
Cross-reference with rubbings and photographs in the Japanese Coin Catalog (Nihon Kahei Katalogu) or specialist references. Digital versions with zoom are useful.
Weigh the coin
Use a precision scale accurate to 0.01g. Counterfeits and anomalous varieties often deviate from the standard weight.
Examine the reverse
Not just the obverse — reverse characters (hai-bun) and rim shape are equally important identification criteria.
Vary the light angle
Use oblique lighting to assess character depth and surface condition. Sharpness of hallmark strikes is also critical in authentication.
Caution: Counterfeits and Altered Coins
Rare varieties attract a significant number of counterfeits and altered pieces. Be alert to the following:
- Re-engraved reverse characters (characters added to plain coins after casting)
- Artificially enhanced depth to simulate mother-coin (bosen) quality
- Sophisticated modern reproductions (particularly those of Chinese origin)
- Partial restoration or repairs to surfaces or edges
For high-value purchases, strongly consider acquiring pieces that have been certified by third-party grading services (NGC, PCGS, JNDA), or purchasing from a reputable numismatic dealer.
Related Guides
This guide is intended for general informational purposes. Consult a specialist before making significant purchases.