Layout of known Konosuke marking patterns. This should be used in conjunction with Konosuke Markings; A Reference Guide.
Naming convention:
Examples: K-F-01, K-F-01-NS
K = Konosuke
F-Knife line where pattern was first used. Patterns are often used on later knife lines as well. F=Fujiyama, FM=Fujiyama FM, etc.
01 = variation #
NS = No Sakai mark
K-F-01
Original Fujiyama pattern with all stamps.
Left Face: Konosuke logo stamp, Sakai stamp, steel kokuin
In Use: 2007 – present
Right Face: No marks
K-F-02
Variation of K-F-01. Steel stamp replaces steel kokuin.
In Use: 2007 – present
Left Face: Konosuke logo stamp, Sakai stamp, steel stamp
Right Face: No marks
K-F-03
Chiseled Konosuke & Sakai kanji
In Use: 2007 – present
Left Face: Steel stamp
Right Face: Chiseled Konosuke kanji, chiseled Sakai kanji
K-F-04
Chiseled Konosuke kanji, chiseled steel kanji & Sakai kanji
In Use: ? – present
Left Face: Chiseled steel kanji
Right Face: Chiseled Konosuke kanji, chiseled Sakai kanji
K-F-04-NS
No Sakai mark version of K-F-04
In Use: ? – present
Left Face: Chiseled steel kanji
Right Face: Chiseled Konosuke kanji, no Sakai kanji
K-BY-01
BY with BY kokuin
In Use: 2026 – present
Left Face: BY kokuin, chiseled steel kanji
Right Face: Chiseled Konosuke & Sakai kanji
K-HD-01
HD Line
In Use: 2007? – ?
Left Face: Konosuke stamp, “HD” stamp
Right Face: No marks
K-HD-02
HD2 Line
In Use: ?
Left Face: Konosuke stamp, “HD” stamp, HD stamp, 弐 (2) stamp
Right Face: No marks
K-HD-10
HD 10th Anniversary Knife
In Use: 2016
Left Face: Konosuke stamp, “HD” stamp
Right Face: #/6 Example shown is 5/6 (old style kanji) Only 6 were made
K-PR-01
Prototype Knife
In Use: 2025-Present
Left Face: No marks
Right Face: Konosuke stamp
K-KT-01
Konosuke X Tosho KT Collab
In Use: September 2023 – present
Left Face: No Marks
Right Face: Tosho kanji laser engraving
