Mesenbet Yibeltal¹, Atsushi Tsunekawa¹, Nigussie Haregeweyn¹, Enyew Adgo², Derege Tsegaye Meshesha², Tsugiyuki Masunaga³, Mitsuru Tsubo¹, Kindiye Ebabu Gelaw¹, Ayele Almaw Fenta¹ and Mulatu Liyew Berihun¹, (1)Tottori University, Tottori, Japan, (2)Bahir Dar University, Bahir Dar, Ethiopia, (3)Shimane University, Shimane, Japan