The customer number of Mobile Virtual Network Operators (MVNOs) is increasing in Japan,
though the mobile phone market in Japan was mainly shared by three Major Mobile-Carriers …

The purpose of this study is to understand the Internet-access service choice behavior
considering the current market in Japan. The customer number of high-speed wireless …

With the development of the telecommunication industry, 5G service has become the core
focus point in every country. This paper establishes a three-oligarchs game model in the …

The number of Mobile Virtual Network Operators (MVNO) customers is increasing in Japan,
though the mobile phone market in Japan was mainly shared by three Major Mobile-Carriers …

The Internet is available for almost all homes in Japan. During the diffusion stage of Internet
access services, it was important to construct a model to evaluate the sensitivity for Internet …

The purpose of this study is to understand mobile user behavior for collaboration services,
especially financial services, offered by mobile carriers in Japan. Mobile phone market in …

抄録 モバイルネットワークを含むインターネット利用環境の向上, 利用端末の多様化,
高機能化により, 多種多様な IT サービスをだれでもいつでもどこでも利用できるようになった. IT …