*Kyoko TANIGUCHI¹, *Haruhiko Mitsunaga², *Koji Watanabe³, *Takao Maruyama⁴, *Hiroshi Ishii⁵ (1. Hiroshima University, 2. Nagoya University, 3. Miyazaki International College, 4. JICA Ogata Research Institute, 5. Hokkaido University of Education)