Natural Wood Rice Container

Yuioke · Edo-bitsu · 700-year tradition · Oke-Ei, Fukagawa, Tokyo

"I believe I am the only person still making these in Tokyo."
OKE-EI has continued the tradition of Edo-style yuioke — traditional Japanese wooden vessels — in Fukagawa, Tokyo for generations. The fourth-generation craftsman, Eifu Kawamata, is the final master to inherit these techniques at their highest level.

The pure grain of OKE-EI yuioke

The pure beauty of OKE-EI's yuioke
The yuioke technique was established in Japan nearly 700 years ago. Thin wooden staves are arranged and bound with hoops — a form that has remained unchanged for centuries. Polished without paint or coating, the grain reads as something living rather than manufactured. The Fukagawa district where OKE-EI is based was once lined with hundreds of timber merchants; crossing the Eitai Bridge, the smell of wood filled the air. That world is largely gone, but OKE-EI remains.

300-year-old Kiso timber, chosen for what it becomes
OKE-EI uses only two materials: natural sawara cypress and hinoki cypress from the Kiso region, both aged over 300 years. Over centuries, the grain tightens and clarifies — the wood becomes resistant to warping, smooth to the touch, light in the hand, and naturally antimicrobial and water-resistant. These are not incidental qualities. They are the reason this timber, and no other, is used.

80 steps, two years, ten years to master each stage
Yuioke-making is one of the most complex traditional crafts in Japan. From log preparation to completion, the process involves approximately 80 steps, and each piece requires at least two years to finish. Mastering every stage takes about ten years.

The many tools of yuioke-making

"The essence of traditional yuioke is the joining of wood to wood — a precision that no factory process can replicate."
— Eifu Kawamata, fourth-generation master, OKE-EI

The signature piece — Edo-bitsu
The Edo-bitsu is the vessel OKE-EI has made since its founding — a traditional form designed specifically to keep cooked rice at its best. The lid and the rim of the bucket are each turned to a perfect circle, then fitted together with a precision that produces a quiet, suction-like seal when placed. Achieving this fit while maintaining structural strength is considered one of the most demanding tasks in yuioke-making; among coopers, those who can make an Edo-bitsu are held in particular regard.

Edo-bitsu — for 2–3 cups of cooked rice

German silver hoops — a considered upgrade
Traditional yuioke used copper hoops to bind the staves. OKE-EI's Edo-bitsu uses German silver instead — an alloy of copper, nickel, and zinc — chosen for its resistance to tarnish and corrosion, and for the refined, lasting luster it brings to the form. The result is a vessel that looks as considered as it performs.

The uncoated sawara cypress absorbs the excess moisture that makes freshly cooked rice turn sticky or dry — keeping each grain distinct and the texture right for up to 24 hours. A faint, clean scent of cypress rises when the lid is opened. Built to last a lifetime; made to be used every day.