City branding is a managerial procedure which offers any given city a distinct identity; providing cities with a chance to present as different, positive and distinguishable from other competitors. In Japan, the use of mascots for city branding is often part of urban planning strategy. Kumamon is the most successful regional mascot in Japan and offers an opportunity to explore the nature of mascot city branding strategies. Employing a large number of promotional strategies, the local prefecture created a unique Kumamon city brand and enhanced the local image, resulting in significant economic benefits. The paper argues that five main factors contributed to the success of Kumamon: government support, power of emotional attachment and anthropomorphism, efficient public transport and tourism services, the mascot branding, and social media. Understanding how Kumamon mascot branding succeeded can assist makers to decide whether to replicate the use of mascot branding in other cities and regions.