Quartz glass is made from silica and has a high level of purity, among other superior characteristics. Deriving its name from the process of melting quartz powder to make glass, the material can withstand temperatures up to 1000 degrees Celsius and is resistant to chemicals. Used in the production of semiconductors and optical fibres, the alluring glass possesses endless clarity.

The history of Japanese kumihimo (braided cords) dates back more than 1300 years to the Asuka period, when the craft is believed to have arrived from China. Developed for use with armour, the cords are braided on specialised looms and possess an inherent robustness. During the seventeenth century, the use of kumihimo expanded to daily wear and accessories. Various techniques are used to create patterns that emphasise the silk’s alluring lustre.

Founded in 2011 in Shioya, Tochigi prefecture. Formerly a supplier of manufactured stones, the company renewed its business under the leadership of current president Toshio Saito. Leveraging its expertise in cutting and polishing stone, the company now produces high quality quartz glass and optical glass, crucial components for state-of-the-art precision machinery and semiconductors. The Quartz Glass series began with the cutting and polishing of Japan’s largest piece of glass, 7 metres high and weighing 4.3 tons, which was truly a sight to behold.

Operating as a family business for more than 130 years, Ryukobo makes kumihimo braided cords in Nihonbashi, Tokyo, under master craftsman Takashi Fukuda. In addition to making kumihimo used to hold the obi sash of a kimono in place, the workshop is rare in that it undertakes all stages of production, from the dyeing of silk threads to design and weaving. Working on commissions from Japan’s imperial family, collaborations with international maisons and more, Ryukobo is constantly pursuing the possibilities of kumihimo.

- Due to the handmade nature of this item, some natural variations may occur.
- Avoid exposure to direct sunlight.
- Place the item on a safe, stable surface.
- The braided cord is made from silk and may fade in colour due to UV exposure.
- The braided cord stretches easily, so when moving the item please lift and carry it from the bottom.
- Strong impacts will cause damage to the item, so please use it with care.
- Do not use a cracked, chipped or split item. In the event the glass becomes damaged, use gloves to avoid injury when handling the item.
- For daily maintenance, wipe with a soft, dry cloth.