Vessel & Kiln

Journal

Notes on Japanese ceramics — how they are made, what the terms mean, and how to live with them.

Qing dynasty ceramic vase covered in an aged, tea-stained crackle glaze (kannyu) with floral overglaze painting

September 14, 2026 · 5 min read

Will It Leak? A Practical Guide to Crackle Glaze (Kannyu 貫入) in Japanese Vases

Crackle glaze (kannyu 貫入) in Japanese vases: what it is, how it differs from crazing, whether it holds water, and how to let the pattern age with use.

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