The Tsubame-Sanjo Factory Festival is the annual open day of the 400-year-old metalwork factory in Niigata Prefecture, Japan. Held since 2013, the festival promotes local products. To emphasize craftsmanship and encourage brightening intimidating industrial spaces, designers took visual elements found in factories, and chose a pink stripe as the festival’s main visual, referring to the furnace fires used for metal processing, which burns a vivid pink, and also the black and yellow keep-out sign commonly found in forges. The eye-catching pink stripes clearly indicate event spaces and, with guidebook in hand, visitors find their way easily around the factories.