Mastering Paulownia with 1/100-Millimeter Precision

In Kinokawa City, Wakayama Prefecture—a region famed for its Kishu paulownia chests (tansu)—is Kagu no Azuma. Founded in 1891 as a lumber business, the company has dedicated over 130 years to crafting paulownia furniture. They manage every step of the process in-house, from selecting the finest wood to milling, construction, and final finishing.

Paulownia wood is exceptionally light, moisture-resistant, and slow to burn—qualities that have made it a prized material for tansu chests, designed to protect precious clothing and heirlooms for centuries. From a single paulownia tree, one chest is born. This craft demands a world of 1/100-millimeter precision. The artisan’s day begins with the sharp, rhythmic sound of a blade being honed.

The first step is the ink marking. Like drawing up a blueprint, lines are carefully drawn onto the wood. Each line embodies the artisan's years of experience and intuition. Paulownia is a living material that breathes with the ambient humidity, and the artisans must 'read' its condition each day to proceed with their work.

The wood is cut with a saw, joints are perfected with a chisel, and the surface is smoothed with a hand plane, revealing the beautiful skin of the paulownia. Traditional joinery methods, such as fully-housed dovetail and housed dado joints, form the chest's framework through the strength of interlocking wood, forgoing the need for adhesives. Wooden pegs provide further support, creating a structure so robust it won't warp even after a century.

The finishing touch is the charred paulownia technique. The surface is carefully charred with flames, the soot is brushed away, and then layers of persimmon tannin and polishing powder are applied and buffed to a fine sheen. As the years go by, the paulownia's unique character deepens, becoming a wooden memory that grows alongside the family.