Strike Activity Detection and Recognition Using Inertial Measurement Unit towards Kendo Skill Improvement Support System

1Graduate School of Information Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan 2JSPS Research Fellowships for Young Scientists, Tokyo 102-0083, Japan 3Department of Advanced Information Technology, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, Fukuoka 819-0395, Japan 4JST Precursory Research Embryonic Science and Technology (PRESTO), Tokyo 102-0076, Japan