Hiroki Funate Genno Japanese Hammer – Handcrafted in Sanjo (225 g to 565 g)

Hiroki Aida

$262.00 USD

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Weight variants 225 g 375 g 450 g 550 g

The Hiroki Funate Genno Japanese hammer is a high-end artisanal hammer, hand-forged in Sanjo (Niigata), a region renowned for its expertise in manufacturing traditional Japanese tools. Its more elongated and refined Funate shape offers excellent stability, perfectly controlled striking, and great precision for joinery, carpentry, and chisel work.

Made by blacksmith Hiroki Aida, who trained with master Ko Saburo Hasegawa, this Genno benefits from remarkable balance and exceptional forging quality. The weights are indicated in grams to facilitate selection, while corresponding to the traditional Japanese values expressed in monme. Each hammer is entirely handmade, making each piece unique with slight variations in dimensions and finish.

KindTraditional Japanese hammer (Genno)
Shape: Funate (elongated head)
Black-smith:Hiroki Aida
WorkshopAitoyo Hammer
OriginSanjo, Niigata – Japan
MaterialForged steel
Manufacturing: Handcrafted

Available sizes (weights converted)

225 g (equivalent to 60 monmes)

Head diameter:approx. 24 mm
Total length:approx. 115 mm
Usage:very precise work, fine scissors
375 g (equivalent to 100 monmes)

Head diameter:approx. 30 mm
Total length:approx. 132 mm
Usage:General carpentry, multi-purpose use
450 g (equivalent to 120 monmes)

Head diameter:approx. 33 mm
Total length:approx. 138 mm
Usage:harder strikes with control
565 g (equivalent to 150 monmes)

Head diameter:approx. 36 mm
Total length:approx. 140 mm
Usage:slender frame, work requiring more inertia