- 
							Tomohide NATSUAKI
														
									Faculty of Agriculture, Utsunomiya University
							
						 
						- 
							Shuichi YAMASHITA
														
									Faculty of Agriculture, University of Tokyo
							
						 
						- 
							Yogi DOI
														
									Faculty of Agriculture, University of Tokyo
							
						 
						- 
							Seiichi OKUDA
														
									Faculty of Agriculture, Utsunomiya University
							
						 
						- 
							Michiaki TERANAKA
														
									Faculty of Agriculture, Utsunomiya University