Emi Tachibana (立花絵美) is a glass artist based in Kanagawa, Japan, working in pâte de verre under the name rokka glass. After graduating from Tama Art University, she went on to study glass craft, refining her skills as an assistant in a glass studio before establishing her own practice.

Pâte de verre is a casting technique that predates glassblowing. Tachibana makes an original form, carves relief patterns by hand into a plaster mould, then fills it with fine granules of glass and fires it in an electric kiln until they fuse. Because every stage is done by hand and each mould can be fired only once, the maker's touch shows clearly, and no two pieces are ever quite the same.

Her motifs come from small, fleeting things: plants that quietly mark the turning of the seasons, snow crystals glinting as they settle, and everyday scenes she wants to hold onto as time moves on. The finished glass has a soft glow like sugar confectionery, with deep gradations of colour and gentle hand-carved relief, a warmth quite different from the cool, polished image glass often carries. Her lidded boxes, small glass caskets made to hold something treasured, brought her work to a wider audience after she first presented them at Luft+alt in Tokyo.