Sumasapo provides SaaS-based solutions to residential property management companies in Japan, digitizing communications between property managers and tenants. Its core services include 'Sumasapo Thank You Call,' a new-tenant onboarding and lifestyle service referral call center; 'totono,' a resident-facing mobile app enabling digital applications, maintenance requests, and chat support; and a key management system for property viewings. The company generates revenue through monthly SaaS fees from property managers as well as referral commissions from utility and lifestyle service providers.