The Japan Aerospace Exploration Agency (JAXA) has been implementing phased and progressive demonstrations of the Model-Based Systems Engineering (MBSE) applications, using small demonstration satellite series, so called the Rapid Innovative Payload Demonstration Satellite (RAISE), as a demonstration pre-cursor. The purpose of the activity is to establish a practical methodology of the MBSE application to satellite projects, to promote its practices, and to infuse MBSE to the Japanese space community. These RAISE satellites are 100kg-class flagships in the Innovative Satellite Technology Demonstration Program, which provides on-orbit demonstration opportunities for new technologies and key-components. This paper presents the phased demonstration strategy, an overall approach, and the technology development of a system model being built for the full application of MBSE to RAISE-4. For the technology development, the paper covers framework, modeling scope, system model building, system model collaboration with analysis/simulation tool, introduction of design rationale and concerns, information sharing through OpenMBEE, for our full application of MBSE.