Samuji is a studio producing sustainable design in the historic district of Vallila, Helsinki.

The design studio was founded in 2011 by Marimekko's previous creative director, Samu-Jussi Koski. It produces cross-artistic work combining various areas of design in addition to its own clothes collection. The Samuji collection is designed in Finland and it is manufactured as nearby as possible in Europe. The collection's timeless style has raised a lot of international interest and it has about 30 resellers in New York, London, Moscow and Tokyo, among others.

In addition to the clothes collection, Samuji has carried out client work for Iittala, Artek and the City of Helsinki. Designer Hennamari Asunta from Samuji was involved in Iittala's Sarjaton project alongside Samu-Jussi Koski.