otherJuly 27, 2026

Kanazawa Hakuichi

Kanazawa gold leaf (金沢箔) is a gold leaf craft produced in Kanazawa, Ishikawa Prefecture. Gold leaf (kinpaku) is made by hammering gold together with trace amounts of silver and copper into an extremely thin foil state. Kanazawa City accounts for 99% of Japan's total gold leaf production, and the product is widely referred to as Kanazawa-haku. The craft is closely associated with the broader tradition of Japanese Traditional Crafts (Other): The Complete Guide, encompassing lacquerware application, Buddhist altar decoration, and fine arts techniques developed over centuries.

History

Gold leaf manufacturing is believed to have begun in ancient Egypt around 1200 BC. In China, gold leaf has been manufactured in Nanjing, Jiangsu Province since the Eastern Jin Dynasty (317–420), giving it approximately 1,700 years of history. In Germany, Schwabach in Mittelfranken, Bavaria has been a principal production area for gold leaf for approximately 500 years.

In Japan, at the beginning of the Edo period, gold leaf beating was monopolized by the shogunate. The Kaga Domain, however, succeeded in obtaining a license after continuing illicit manufacturing, establishing the legal foundations for Kanazawa's gold leaf industry. In the late Edo period, kinasago (gold dust) was used in two types: aogane, with a higher silver content, and akagane, with a higher copper content. The high-humidity climate of Kanazawa proved particularly suitable for gold leaf beating work. Kanazawa City's dominance in production is also partly due to the proximity of lacquerware and Buddhist altar production centers in Kanazawa, Wajima, and Nanao cities, which created sustained local demand. Kyo Yuzen Kinkaku, or Gold-Leaf Decorated Kyoto Textiles, represents another significant tradition in which gold leaf is applied to textile surfaces.

Techniques & Production Process

The gold leaf manufacturing process is divided between two specialist roles: zumiya, who perform nobékin (rolling) and uwazumi (thinning), and hakuya, who perform hakuuchi (beating). The process proceeds through several distinct steps:

In the kaneawase step, gold and trace amounts of silver and copper are heated to 1,300 degrees Celsius in a crucible to create an alloy. In the nobékin step, the gold alloy is rolled by a rolling machine to 3/100 millimeters and cut into 6-centimeter squares. In the shitaté step, the uwazumi beaten to 3/1,000 millimeters is cut into approximately 20-centimeter squares and sent to the hakuya. In the uchimae step, the foil is beaten and extended to 2–3/10,000 millimeters. In the final hakuutsushi step, the foil is cut to a specified size using a bamboo frame and sandwiched in mitsumata washi paper. Gold leaf is generally sold in units of 100 sheets.

From 1 cubic centimeter of gold, approximately 10 square meters of gold leaf can be produced. The most commonly used grade, called shigou-iro, is stretched to a thickness of approximately 0.0001 millimeters.

Gold leaf is used for furniture such as chests of drawers and folding screens, fixtures such as sliding doors, lacquerware, Buddhist statues, Buddhist altars, and building exteriors and interiors. Craft techniques using gold leaf on lacquerware include chinkin and maki-e; for adorning Buddhist statues, kirikane was developed. In the field of fine arts, kiribaku (finely cut gold leaf), kinasago (powdered gold leaf), and kindei (gold leaf powder dissolved in nikawa glue) are also used. In screen paintings, kiribaku is used to express clouds and similar motifs, while kinasago is used to express mist. The overlap areas of gold leaf in screen paintings are called hakuashi.

A notable by-product of the manufacturing process is abura-tori paper (oil-blotting paper), repurposed from the hakuuchi-gami used to sandwich the gold during beating. Gold and silver are both approved as food additives, and gold leaf of shigou-iro grade or higher is approved for edible use. Gold does not react with strong acids except aqua regia, so ingested gold passes through the body without reacting with digestive fluids such as gastric acid and is excreted unchanged. Copper, however, can leach out and is toxic, so gold leaf used to decorate food must not contain copper.

How to Identify Kanazawa Hakuichi: Gold Leaf Crafts from Ishikawa

Two principal types of gold leaf can be distinguished by their surface appearance and production method. Fuchitsuki gold leaf, made using washi hakuuchi-gami, has a soft luster and is characterized by a lattice-shaped mark created during beating. Dangiri gold leaf, made using glassine paper, has a strong luster and no surface unevenness. Fuchitsuki gold leaf is more expensive because it requires greater labor and time to produce, while dangiri gold leaf is less expensive due to a mechanized production process.

Hakuuchi-gami that has been used for more than ten years in gold leaf manufacturing is called furuya-gami and is treated as a luxury item. Gold leaf is also classified by grade according to its alloy composition. The shigou-iro grade contains 94.43% gold, 4.9% silver, and 0.66% copper. The gomotoshoku grade contains 98.91% gold, 0.49% silver, and 0.59% copper. The mizuiro grade contains 59.74% gold and 40.25% silver, with no copper content. Gold leaf made solely from gold is called pure gold leaf (junkinhaku), while gold alloyed with silver and copper is called (hon)kinhaku. Western gold leaf (yokin-haku), made from brass, is also widely available.

The Craft Today

Kanazawa City in Ishikawa Prefecture currently accounts for 99% of Japan's total gold leaf production. The city's dominance is sustained by its high-humidity climate, which is suitable for gold leaf beating work, and by the continued presence of related craft industries — including lacquerware production associated with Wajima and Nanao — that generate demand for gold leaf applications. Gold leaf produced in Kanazawa is applied across a wide range of products, from traditional lacquerware and Buddhist altars to building decoration and fine arts. Edible applications are also recognized for grades meeting food additive standards.

Frequently Asked Questions

What is Kanazawa gold leaf made from?

Kanazawa gold leaf is made by hammering an alloy of gold with trace amounts of silver and copper into an extremely thin foil. The most common grade, shigou-iro, contains 94.43% gold, 4.9% silver, and 0.66% copper. Pure gold leaf (junkinhaku) contains only gold, while Western gold leaf (yokin-haku) is made from brass.

How thin is gold leaf?

The shigou-iro grade of gold leaf is stretched to a thickness of approximately 0.0001 millimeters. From 1 cubic centimeter of gold, approximately 10 square meters of gold leaf can be produced.

Why does Kanazawa dominate Japan's gold leaf production?

Kanazawa accounts for 99% of Japan's total gold leaf production. This dominance is attributed to several factors: the Kaga Domain obtained a production license during the Edo period after initially producing gold leaf illicitly; the high-humidity climate of Kanazawa is suitable for beating work; and nearby lacquerware and Buddhist altar production centers in Kanazawa, Wajima, and Nanao cities provide substantial local demand.

What is the difference between fuchitsuki and dangiri gold leaf?

Fuchitsuki gold leaf is made using washi hakuuchi-gami and has a soft luster with a lattice-shaped mark from the beating process. Dangiri gold leaf is made using glassine paper, has a strong luster, and no surface unevenness. Fuchitsuki is more expensive due to greater labor requirements, while dangiri is less expensive because its production is mechanized.

Can gold leaf be used on food?

Gold and silver are both approved as food additives. Gold leaf of shigou-iro grade or higher is approved for edible use. Gold leaf used on food must not contain copper, as copper can leach out and is toxic. Gold itself does not react with digestive fluids such as gastric acid and passes through the body unchanged.