kubell Co., Ltd. kubell Co., Ltd. (4448.T), formerly Chatwork Co., Ltd., operates as a Japan-based provider of business communication platforms and Business Process as a Service (BPaaS) solutions targeting small and medium-sized enterprises (SMEs) primarily in Japan; offers Chatwork, the nation's leading business chat tool featuring task management, file sharing, video calling, and seamless external connectivity; provides TAXITA, a chat-integrated outsourcing service for back-office functions including accounting, HR, payroll, recruitment, and sales administration; delivers Secure SAMBA, a secure cloud storage solution; and acts as a sales agent for third-party security software with related consultancy. The company maintains a single Platform Business segment encompassing SaaS offerings like Chatwork and high-value BPaaS services that outsource entire processes via cloud integration, serving over 935,000 adopting companies with a freemium model that drives network effects through user referrals. Founded in 2004 and headquartered in Minato-ku, Tokyo, kubell Co., Ltd. shifted strategically from Chatwork Co., Ltd. in July 2024 to emphasize BPaaS expansion; launched wholly-owned subsidiary kubell partner Co., Ltd. in April 2024 to accelerate BPaaS development, including TAXITA rollout; acquired MINAGINE Co., Ltd. in February 2023 for payroll and attendance solutions; integrated kubell partner with MINAGINE operations on July 1, 2025; discontinued its legacy Security segment to focus resources; revised FY12/25 guidance upward in October 2025 to project revenue of ¥9,571-9,826mn, operating profit of ¥120-414mn, and EBITDA of ¥1,005-1,300mn amid 84.7% YoY EBITDA growth in 1H FY12/25 and robust Chatwork paying ID increases.