The Tsunagaru Katachi wedding rings – Tsunagaru means being connected – are made using a 400-year-old Japanese forging technique called Mokume Gane. The layering and then forging together of numerous differently coloured metals produces a pattern akin to wood grain. This technique makes it possible to create a unique pattern for every bride and groom. That creates a special bond which is strengthened when the couple itself divides the ring to create two wedding rings.