A self-initiated rebrand of Toyo Ito's Sendai Mediatheque, the landmark Japanese library and media centre that opened in 2001. The building is known around the world, but its identity had never been built for a global audience. We designed a new identity drawn from the building itself: a mark made of three stacked floor plates, set with a bilingual English and Japanese wordmark. The system runs in paper, black and a single signal red. We carried it across a wayfinding app, an app icon, a website and on-site signage, so it works as well on a phone screen as it does inside the building.