Using the hotaru-de technique, Taruta first throws his pieces on a wheel before piercing them with a sharp tool. The work is then glazed so that the small holes are filled with translucent glaze. This allows light to fill the vessels — as if illuminated by tiny fireflies (hotaru).

In standard ambient lighting, Taruta’s work appears a gorgeous celadon blue, but when lit from above, the vessels glow magically with incredible radiance, which is the meaning of their title: Koubou (光芒).