道心斎正行 鋼付四角玄翁 黒木目 100匁 Old stock Masatsura Damascus Hand made Pasting steel Square Hammers

Rare Find – Masatsura Black Damascus Square Hammer (Genno) | 375g | Echigo Sanjo

A rare opportunity to own a handmade Japanese square hammer (shikaku genno) by Baba Masatsura (道心斎正行), a master craftsman from Echigo Sanjo — Japan's most celebrated region for hand-forged tools with over 400 years of tradition.

What Makes This Hammer Special

• Black Damascus finish (Kuro-mokume): A striking layered pattern that is both beautiful and functional — reducing glare and surface friction
• Steel-laminated (Hagane-tsuki): Hard steel striking face bonded to a softer iron body — the hallmark of premium Japanese hammer construction
• Hand-forged by Baba Masatsura — one of Echigo Sanjo's most respected hammer smiths

Specifications

• Type: Square genno (shikaku genno)
• Weight: 375g (100 monme / 100匁)
• Face size: approx. 88mm × 25mm × 28mm
• Finish: Black Damascus (Kuro-mokume)
• Construction: Steel-laminated (hagane-tsuki)
• Handle: Not included (handle sold separately)
• Origin: Echigo Sanjo, Japan

Available Weights

200匁 (750g) / 180匁 (675g) / 150匁 (565g) / 120匁 (450g) / 100匁 (375g) / 80匁 (300g) / 60匁 (225g) / 50匁 (190g) / 40匁 (150g) / 30匁 (112g)
1 monme (匁) = 3.75g

Collector's Note

This is a rare vintage stock item. As it has been stored for many years, minor surface rust or packaging wear may be present. Please review all photos carefully before purchasing. These imperfections are part of its authentic character — and do not affect performance.

Perfect For

• 🔨 Carpenters & woodworkers seeking a premium Japanese hammer
• 🎌 Collectors of traditional Japanese hand tools
• 🎁 A one-of-a-kind gift for the serious craftsperson

Once it's gone, it's gone — this is a one-of-a-kind piece.