Japan is one of leading countries in the research and development of carbon nanotubes (CNTs). Since a Japanese scientist, Prof. Sumio Iijma, discovered CNTs in 1991, a lot of research on CNTs have been done in the world. Because CNTs are an interesting material which can be 20 times stronger than steel, half weight of aluminum, and 1000 times as conductive as coppers. CNTs have a potential to influence a wide range of applications such as electronics, automotives, medicine, aerospace, defense, energy, and construction. The global CNT market was €1.1 billion in 2010 and it estimated to grow €2.2 billion in 2016 (1). Recently in Japan more focus is on the development of mass production technologies of CNT in order to reduce the production cost.