Ooya Seisakusho Copper Grater – Double-Sided No.4 Oroshigane, Handmade in Japan

This handcrafted Oroshigane (Japanese grater) by Ooya Seisakusho features a soft copper sheen and razor-sharp teeth that finely cut fibers rather than tearing them. 

The result is a light, airy texture—like freshly fallen snow—that brings out the natural sweetness and moisture of daikon radish and other vegetables.

Each grater is meticulously hand-forged in Saitama, Japan, following traditional Edo-period techniques.

Skilled artisans raise each tooth individually by striking a hard copper plate with a tagane (chisel) and hammer, creating subtle variations in angle and height. These micro-irregularities make grating smoother and more efficient, as the surface catches ingredients evenly without constant repositioning.

The grating surface is finished with a tin coating (suzumeki) for smoothness and corrosion resistance, while the handle retains the warm hue of pure copper.

Over time, the copper develops a beautiful patina, adding character to your kitchen.

Renowned for its durability and timeless design, this double-sided No.4 model can be maintained and re-sharpened for years of faithful use. Perfect for grating daikon, ginger, apples, or even cheese, it’s a piece of Japanese craftsmanship that elevates everyday cooking.

Features
・Handcrafted copper Oroshigane made by Ooya Seisakusho in Saitama, Japan
・Traditional Edo-period hand-raising technique using hammer and chisel
・Produces finely textured, snow-like grated daikon with excellent moisture balance
・Double-sided grater for versatile use with vegetables and fruits
・Tin-plated grating surface for corrosion resistance and smooth grating
・Beautiful patina develops with age, enhancing its warmth and character

Product Details
・Material: Copper with tin plating
・Origin: Saitama, Japan
・Size: 22.5 × 13.0 cm (8.9 × 5.1 in)
・Weight: Approx. 320 g (0.7 lb)
・Packaging: Comes in a gift box

Care Instructions
Hand wash with mild detergent and dry thoroughly. Avoid using metal brushes. The grater can be re-sharpened (metate) by a craftsman for long-term use.