Silvery constellations float across this tea bowl's midnight surface—Kitamura Shōhō's yuteki (oil-spot) glaze transforms iron oxide into optical phenomena that seem to defy ceramic logic, where chemistry produces effects resembling precious metal inlay without incorporating any metallic elements. This bowl belongs to Kosei-yaki's experimental lineage, where twentieth-century potters revisited Song Dynasty Chinese glaze techniques through contemporary Japanese sensibilities. The oil-spot effect emerges from iron-saturated glazes during reduction firing—oxygen-starved kiln atmospheres force iron particles to crystallise into silvery spots that float atop darker glaze surfaces. Achieving consistent results demands mastery of multiple variables: clay body composition, glaze chemistry, firing temperature curves, and atmospheric oxygen levels throughout multi-hour firing cycles. Kitamura spent decades refining these parameters; this bowl represents accumulated knowledge from a lifetime pursuing single-minded technical excellence. The form follows classical chawan proportions: generous diameter accommodating ceremonial tea whisking, foot ring proportioned for comfortable two-handed cradling, walls tapering to facilitate foam creation. Yet the glaze treatment transcends tradition—those shimmering spots create visual dynamism rare in historical precedents, suggesting contemporary artistic ambition operating within traditional frameworks. This bowl addresses current design preferences through unexpected aesthetic harmonies. The dark ground colour anchors compositions in minimalist interiors increasingly dominated by pale palettes—providing chromatic weight without aggressive colour assertions. The oil-spot glaze satisfies appetites for textural interest whilst maintaining overall tonal discipline. London interior designers have begun specifying such pieces precisely for this quality: objects possessing sufficient visual complexity to prevent sterility whilst respecting contemporary preference for restrained palettes. Condition assessment reveals honest wear from thoughtful use. The bowl's surfaces remain intact without chips compromising structural integrity or aesthetic presentation. The glaze exhibits its original lustre, unmarred by abrasion or chemical degradation. Minor handling marks appear on the exterior—subtle oil absorption where hands repeatedly cradled the bowl during drinking, evidence collectors recognise as authentication of ceramic's engagement with human use rather than display-only preservation. Kosei-yaki ceramics occupy specialised collections, primarily in Japanese institutions documenting regional pottery traditions and technical innovations. International awareness remains limited compared to more famous kiln sites, creating opportunities for discerning collectors to acquire exceptional works before broader market recognition inflates values beyond accessibility. This bowl represents centuries-old ceramic traditions reimagined through modern technical understanding—objects honouring historical precedents whilst asserting contemporary artistic identity. For collectors seeking pieces demonstrating both craft mastery and aesthetic sophistication, works like this offer rewards sustaining interest across years of daily engagement. Shipping & Handling We ship worldwide via DHL or EMS with full insurance and tracking. Museum-standard packing with rim protection and custom cushioning; combined shipping available for multiple wins. Local customs duties are the buyer's responsibility. Seller Guarantee We specialise in Japanese oil-spot glazes and regional pottery, guaranteeing this piece's authenticity. Questions welcome – we reply within 24 hours. 1158