Bizen Yaki Yunomi Tea Cup | Showa Period | Hi-iro Goma & Interior Shizen-yu Glaze

The Japanese tea cup — yunomi (湯呑み) — is among the most intimate objects in the ceramic tradition. Unlike the formal chawan of the tea ceremony, the yunomi belongs to daily life: morning tea before work, an evening cup shared in quiet. And yet the finest yunomi demand the same attention from a potter as any ceremonial vessel, because the hand holds it constantly, the lips meet the rim repeatedly, and the eye is always close. In the Bizen tradition (備前焼), a yunomi is fired without glaze in an anagama (穴窯) tunnel kiln over ten to fourteen days, and whatever the fire writes on the clay is what remains — permanent, unrepeatable, and entirely beyond the potter's control after the kiln door is sealed.

This yunomi carries a fire narrative of unusual richness. The outer body is marked by sweeping hi-iro (火色 — fire-scarlet): warm red-orange tones that trace the path of the anagama's direct flame across the clay, likely the result of the piece being placed on its side during loading — a technique used by Showa studio potters to coax asymmetrical, painterly fire effects. Goma (胡麻 — sesame ash) deposits scatter golden-olive across the shoulder and mid-body, where burning wood ash settled and fused into the surface. Cooler gray-green tones in the lower register complete a surface that moves through at least four distinct atmospheric zones — the record of a single, unrepeatable firing.

The decisive feature of this piece, however, is inside. Looking into the cup from above, the interior base holds a pool of shizen-yu (自然釉 — natural ash glaze): ash that fell into the interior during firing, melted under sustained high heat, and formed a spontaneous glaze layer of its own — glossy, olive-green to blue-brown, with the smooth undulation of liquid captured in stone. This cannot be planned. The potter who loads the kiln cannot predict which pieces will receive interior ash fall. It is among Bizen's most prized accident-gifts, and it transforms this yunomi from a drinking vessel into a landscape — an exterior of fire-swept earth and an interior of frozen liquid.

The barrel-shaped body with gently shouldered profile and wide flat rim fits naturally in both hands; the low foot ring lifts it cleanly from a table surface. For daily tea use, the unglazed outer clay develops yo-hen (窯変 — kiln-change) tonal depth over time as it absorbs tea oils — a process Bizen collectors call migaite yoku naru (使って良くなる, "becoming more beautiful with use"). For the collector, this piece is already fully resolved.

Excellent structural condition. No chips, cracks, or repairs. Interior shizen-yu intact and stable. Unsigned; consistent with Showa studio production