The world from around 1990, Fabless semiconductor companies are making a remarkable breakthrough based on the market standard strategy of the Application Specific Standard Product (ASSP). Therefore, Japanese leading semiconductor companies do not strive for developing the ASSP. Similarly, the fabless semiconductor ventures also have not been successful on the ASSP business. But, a fabless semiconductor venture of the case study whose ASSP became market standard, had reaped a huge income that cooperates with semiconductor distributor and a leading user company. The authors clarify the issues of fabless semiconductor ventures in Japan. In addition, the authors analyze the critical success factor of this company, and suggest the cooperation for the opportunity to market access with fabless semiconductor ventures.