Complex sentence: Ryusaku Yanagimoto was a naval attaché to Britain and then as an instructor at the Naval War College Captain of the aircraft carrier Sōryū on 6 October 1941.
Split into simpler sentences: Ryusaku Yanagimoto was a naval attaché to Britain and then as an instructor at the Naval War College. He was made the Captain of the aircraft carrier Sōryū on 6 October 1941.