ceramicsAugust 01, 2026

Iga-yaki

Iga-yaki (伊賀焼) is a type of ceramic (earthenware) produced in Iga City, Mie Prefecture, with origins said to date to around the 5th century. It was designated as a Traditional Craft Product (Dentō-teki Kōgeihin) by the national government in November 1982. The craft is particularly noted for its clay, which derives from ancient Lake Biwa strata, and for a long history spanning utilitarian wares, refined tea ceramics, and heat-resistant cookware.

History

Iga-yaki is said to have originated around the 5th century. During the medieval period, kilns in the Iga region — including the Gonoki kiln site near Makiyama in Iga City — produced utilitarian objects such as mortars (suribachi), jars (kame), and pots (tsubo) in a style comparable to Shigaraki-yaki. The craft is also known for its medieval production of crouching figures (uzukumaru).

In the early 17th century Momoyama period, tea ceramics — including water jars and flower vases — were fired at the Saikoji kiln in Makiyama and the Doya kiln in Marubashira under the guidance of warrior-tea master Furuta Oribe. Archaeological surveys have confirmed that during the Momoyama period, Iga-yaki was fired at three locations: Makiyama kiln, Marubashira, and within Ueno Castle. The feudal lords of Iga Province during this period included Tsutsui Sadatsugu and Todo Takatora and Takatsugi.

When Todo Takahisa established a system to prevent excessive mining of Iga clay, many potters relocated to Shigaraki, causing a temporary decline in the tradition. In the 18th century, Todo Takayoshi encouraged pottery production, ushering in the so-called "Saikō Iga" (revived Iga) era. This revival centred on glazed everyday wares, and items such as yukihira pots, dobin teapots, and donabe earthenware pots spread nationwide. Since the Meiji period, production of heat-resistant tableware utilizing the particular properties of Iga clay has become mainstream. As of 2021, approximately 50 kiln workshops (窯元) operate in Iga City.

Techniques & Production Process

The clay used in Iga-yaki is sourced from ancient Lake Biwa strata. Its many fine pores make it particularly effective at retaining heat, a property that has historically supported the production of cookware and heat-resistant tableware. This material quality is central to Iga-yaki's identity as a functional ceramic tradition. The distinctive surface effects seen on Ko-Iga (old Iga) ware — including natural ash glaze (bidoro), scorched effects, and dripped iron glaze — result from high-temperature wood-fire kiln techniques in which ash deposits and scorching occur naturally during the firing process. Decorative techniques on Ko-Iga pieces include wave patterns made with spatula tools and grid-pressed surface textures. The craft encompasses both the refined, intentionally distorted tea ceramics of the Momoyama period and the glazed domestic wares characteristic of the Saikō Iga revival period.

How to Identify Iga-yaki

Ko-Iga (old Iga) ware is identified by several characteristic features: wave patterns created with spatula tools, grid-pressed surface patterns, deliberate distortions of form, a green bidoro (ash glass) glaze, natural ash deposits and scorching from the kiln, and dripped iron glaze. Ko-Iga ware is further described as embodying a bold wabi aesthetic, with heavily distorted forms associated with Oribe-gonomi (the taste of Furuta Oribe). Iga-yaki pieces are sometimes categorised as "Tsutsui Iga," "Todo Iga," or "Enshu Iga," though the attribution of specific pieces to these categories remains speculative. A notable surviving example is the Mimitsuki Mizusashi (water jar with ears) named "Yabukure," held at the Goto Museum; it is a designated Important Cultural Property and is accompanied by a letter by Furuta Oribe. The 16-chamber climbing kiln (noborigama) at the Iga-yaki site, which was operational from its founding in the Tenpo era of the Edo period until the 1960s, is registered as a national Tangible Cultural Property.

The Craft Today

As of 2021, approximately 50 kiln workshops operate in Iga City, Mie Prefecture. Since the Meiji period, production has centred on heat-resistant tableware that makes use of the thermal properties of the local clay. Iga-yaki is part of the broader landscape of Japanese Ceramics recognised under the national Traditional Craft Product designation system. Visitors to Tokyo can view and purchase designated traditional craft items, including ceramics, at Dentou Kogei Aoyama Square (8-1-22 Akasaka, Minato-ku, Tokyo 107-0052), which is operated by the General Foundation for the Promotion of Traditional Craft Industries and is open from 11:00 to 19:00 year-round except for the New Year holiday period.

Frequently Asked Questions

What makes Iga-yaki clay distinctive?

The clay used in Iga-yaki is sourced from ancient Lake Biwa strata. It contains many fine pores, which make it particularly effective at retaining heat. This property has historically made Iga-yaki well-suited for cookware and heat-resistant tableware.

When was Iga-yaki designated a Traditional Craft?

Iga-yaki was designated as a Traditional Craft Product (Dentō-teki Kōgeihin) by the national government in November 1982.

What are Ko-Iga ceramics?

Ko-Iga (old Iga) refers to the refined tea ceramics produced primarily during the Momoyama period under the influence of warrior-tea master Furuta Oribe. They are characterised by deliberate distortions of form, natural ash (bidoro) glaze, wave and grid surface patterns, iron glaze drips, and scorched effects resulting from wood-fire kiln techniques.

How many kilns currently operate in Iga?

As of 2021, approximately 50 kiln workshops (窯元) operate in Iga City, Mie Prefecture.

How does Iga-yaki relate to Shigaraki-yaki?

During the medieval period, Iga-yaki production at kilns such as the Gonoki kiln site near Makiyama yielded wares — including mortars, jars, and pots — comparable in style to Shigaraki-yaki. When restrictions on Iga clay mining were imposed, many potters relocated to Shigaraki, contributing to a temporary decline in Iga-yaki production.