Infamous Boundaries on Instagram: "Japanese Type D Koryu midget submarines in drydock, 1945 In a drydock at Kure Naval Base, Japan, 19 October 1945. There are at least four different types of midget submarines in this group of about eighty-four boats, though the great majority are of the standard “Koryu” type. The two boats at right in the second row appear to have an enlarged conning tower and shortened hull superstructure. The two boats at left in that row are of the earlier Type A or Type C d