Glossary · Materials
Japanese Cordovan - Shinki Hikaku
Definition
Shinki Hikaku's Japanese shell cordovan represents the absolute pinnacle in working this noble leather. It is not horse leather in the traditional sense: it is the dense, compact inner layer of the equine back, which Shinki extracts and works using techniques inherited through generations of master tanners. The tanning is vegetable-tanned, using long processes, that make the leather feel almost alive beneath your fingers. For a watch strap, it is extraordinary: it develops a deep, almost vinegary patina over time. It resists water and impact like few materials, yet maintains a softness that grows with wear. The colors—dark brown, bordeaux, black—are natural, not painted on. Japanese craftsmanship adds a precision in finishing that historical American tanneries never achieved. On a 20mm strap for an Omega Seamaster or a Rolex Datejust, it is simply magnetic: the weight, the solidity, the effortless elegance. Shinki does not mass-produce: each batch has subtle color variations, a sign of genuine craftsmanship.
Frequently asked questions
How do I care for a Japanese Cordovan watch strap over time?
Maintenance is minimal, but intentional. Shinki Hikaku uses vegetable-tanned leather that protects naturally: avoid prolonged soaking, no wax or aggressive oils needed. Once every six months, if exposed to strong sunlight, use a soft dry brush and a small amount of cordovan-specific oil. Patina is your ally: it hides signs of wear and enhances aesthetics. On an 18mm watch strap for a vintage Rolex Datejust, the leather ages beautifully, almost like fine wine.
What is the difference between Shinki Hikaku and American cordovan (Horween)?
Both are exceptional, but follow different philosophies. Horween (USA) has a century-long history, robust vegetable-tanned leather, faster and more vibrant patina development. Shinki (Japan) is even slower: 6-8 months of tanning versus 3-4 for Horween, resulting in denser, deeper leather. On a 20mm watch strap for an IWC Portofino, Shinki offers a darker, more 'serious' initial color that gradually brightens over time. Horween is more versatile; Shinki is a choice for those seeking a lifetime companion. Both develop natural creasing that speaks to authenticity.
Which watch is best suited for a Japanese Cordovan watch strap?
It shines on classic dress watches and elegant sports watches: Rolex Datejust (36-40mm, 20mm lug width), Omega Seamaster (42mm, 20mm lug width), Patek Philippe Calatrava (35-38mm, 18mm lug width). The deep color enhances white porcelain or dark blue dials. Avoid it on aggressive sports watches (heavy dive watches, sports models): cordovan prefers formal wrists. On a 22mm watch strap for a vintage Rolex GMT-Master it is almost sinful: the leather's density handles the weight, the patina emerges nobly. For vintage watchmaking (1960s-1970s) it is a natural choice: it restores original dignity.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only