Upcycling traditional Sashiko into interactive tech interfaces

TOMOS company, a welfare-oriented firm based in Tochigi Prefecture, unveiled a series of interactive installations that merge traditional Japanese Sashiko stitching with conductive technology.

Their project is named “SA→SHI”, and focuses on adding technology and creativity to discarded or broken items to generate new functions and value. Following a previous project centred on kintsugi, this latest research and development effort explores the potential of Sashiko embroidery. By embedding conductive threads into traditional Boro textile, the project upcycles waste textiles into functional interfaces capable of manipulating light and sound.

The company employs individuals through Type A and Type B employment support programmes, aiming to establish a business model that builds high-end brands from within the welfare sector. Dentsu Lab Tokyo oversaw the planning and direction, while techika provided technical implementation and Marujin supplied reflective materials.

The exhibition featured three primary works. The “SA→SHI LAMP LIGHT” is a lamp shade made from patched Boro fabric. It utilises the Hitomezashi technique to align conductive threads in vertical rows, turning the surface into a touch sensor. Users can adjust brightness by stroking the Yakane (arrow feather) pattern, which symbolises protection against evil, or change the light’s colour via the Kakinohana (persimmon flower) pattern, a symbol of fertility.

A second piece, the “SA→SHI COAT SOUND,” is a traditional Hanten coat modified with Boro patches on the shoulders and arms. The garment features a layered structure of conductive fabric and perforated padding. Movement causes the conductive elements to touch, triggering sounds from speakers embedded in the collar. The piece uses the Asanoha (hemp leaf) pattern, traditionally associated with the healthy growth of children.

The final item is the “SA→SHI BAG REFLECTION,” a tote bag designed to hold vinyl records. It incorporates reflective threads stitched in the Seigaiha (blue ocean wave) pattern. This design represents a desire for eternal peace and serves a functional purpose by increasing the visibility and safety of the wearer at night.

We look forward to future edtions of the exhibition, which hopefully will continue demonstrating circular economy principles applied to tradition, welfare and technology.