The Walking cities Lab collaboration aims to develop the newly established UCL-Osaka University Walking Cities Lab (WCL) as a hub for interdisciplinary, multicultural, collaborative, and inclusive co-production of knowledge, methods, and partnerships in and about walking cities that are not walkable. The lab was initiated as part of the Osaka University – University College London (UCL) International Joint Research Project on a street-based approach to informal settlement improvement in African cities. An interdisciplinary group from Osaka University and UCL set out to investigate how low-income urban citizens build and give meaning to their walking environment, transforming existing routes and facilities to improve their everyday walking experiences and practices. The first case study was Moyiba, an informal settlement in Freetown, Sierra Leone with the support of the Sierra Leone Urban Research Centre (SLURC). Learning from this experience, the lab aims to extend this research to similar urban contexts across Africa.