Hirotaka Kojima is Software Engineer, Cloud Service Development at NTT Communications in Tokyo, Japan. He is working to manage OpenStack Nova based Cloud Service (eg. Enterprise Cloud of NTT Communications). He also has one year experience working as a system administrator for Unix/Linux Web Hosting Service for Verio, Inc which is a subsidiary of NTT America, in Boca Raton, U.S.A.. He graduated from Nanzan University with a Master's Degree in Information Science.