Kobashi Studio (formerly Rinouma) is a Japanese brand that produces limited-edition, handmade accessories from solid brass. The independent company works with master metalworkers and craftspeople who use traditional techniques to create the brass objects by hand. Limited to a small number of items, the Kobashi collection comprises key rings, key chains, and business card holders as well as brass hardware and buckles. Apart from the core solid brass line, the brand also produces leather wallets and card holders. Kobashi products are sold all over the world, including in the US, Australia, China, and various European countries.