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Michio Koinuma: Mashiko, Yakishime and the Weight of Form
Updated: Oct 28
A square opening sits above sloping shoulders. Below it, dark panels and projecting ridges give a ceramic jar the presence of a compact structure. This handled work by Michio Koinuma offers a useful starting point for a wider question: how can a familiar vessel become an independent exploration of weight, space and clay? Its interest begins with the form before we know its history.
Mashiko held more than one ceramic possibility
The Mashiko Museum of Ceramic Art records that Koinuma established his Ichimoku kiln in Mashiko in 1969. Its retrospective places him within a climate, emerging around 1970, in which artists inspired by Shoji Kamoda explored expressive form and the character of clay. The museum also notes Mashiko’s longer history of glazed pottery. These approaches shared a place without becoming a single style.
This context changes how we use the name Mashiko. It can introduce a field of inquiry rather than tell us what every pot must look like. Koinuma’s squared jar takes us towards projecting edges, substantial walls and a strongly organised silhouette. The museum describes his freedom from an exclusively wheel-based approach. That general account opens possibilities for looking; it does not reconstruct the making of our individual jar.
What yakishime tells us
Our record calls the work a yakishime jar. The Japan Foundation defines yakishime broadly as firing unglazed ceramics at high temperatures. Its exhibition follows the subject across tea wares, food vessels and independent art objects. The term therefore gives us a material and cultural starting point, while leaving a wide range of artistic decisions open.
A photograph cannot supply every kiln condition. We can still look closely at the actual result. Here, brown and charcoal passages meet paler grey areas. Small marks and unevenness interrupt the larger planes. Light catches projecting edges while settling into the incised channels. The work’s attraction comes from these differences operating together: a forceful overall structure contains a surface that never becomes uniform.
An old-looking surface, a newly imagined shape
The Mashiko museum compares Koinuma’s sturdy forms and dark surfaces to ancient bronzes and haniwa. This is a visual association within his artistic language. Looking at the handled jar, we can understand its appeal without treating it as an excavated object. Its firm corners and repeating ledges feel deliberately composed; its varied tones suggest a slower, less easily measured passage of time.
The close view offers another rhythm. Angular lines turn across a panel below a broad ridge. Their shallow darkness differs from the stronger shadow beneath that ridge. One directs the eye over a surface; the other makes a projection feel physically present. Seeing the two together is especially rewarding because a small detail repeats the larger work’s conversation between drawing and depth.
A jar still has an inside
For all its architectural character, the jar keeps the essential contrast between an outer body and a dark interior. The square mouth lets us recognise containment, while the short supports introduce small intervals beneath the mass. These spaces prevent the object from reading as a solid block. Its particular beauty lies in holding substantial presence and carefully placed emptiness in balance.
Follow one incised angle, then a projecting ridge above it. How differently do those two lines describe the same jar’s volume?
The finished handled jar is shown for reference. General yakishime descriptions and museum history do not establish its exact clay, construction sequence, kiln conditions or production year.
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