However , in July 1941 , he was transferred to take command of the IJN 6th Fleet , which consisted of the Japanese submarine forces .
In June 1940 , Shimizu was appointed commander in chief of the IJN Training Fleet .
In July 1941 , Shimizu was transferred to take command of the IJN 6th Fleet , which consisted of the Japanese submarine forces .
In June 1940 , Shimizu was appointed commander in chief of the IJN Training Fleet .