Change Vision, Inc. is a Japanese software company founded on February 22, 2006. It develops Astah, a family of desktop modeling tools for software design, systems engineering, and safety analysis. The company's work centers on model-centric engineering: using visual models as the shared basis for designing, communicating, and verifying software and systems. The Astah product line includes Astah Professional and Astah UML for software modeling; Astah SysML for model-based systems engineering (MBSE); SysMLv2 Editor and SysMLv2 Modeler (early access) for SysML v2; Astah System Safety for safety analysis with notations such as GSN and STAMP/STPA; and Astah Viewer, a free application for viewing models. As of September 2026, Change Vision had 683,720 registered members in 144 countries, and Astah was used at 894 schools. The company offers free licenses for students and site licenses for universities. Change Vision is a member of industry and standards organizations including INCOSE (International Council on Systems Engineering), ASAM, JasPar, and JASA (Japan Embedded Systems Technology Association), with a focus on systems engineering, automotive software, and safety-critical systems.