Poster JSlavick:
With the help of another researcher, this mention of Kriegsmarine men serving aboard a aircraft carrier in the logs is confirmed. He referenced and pointed me to material that confirms three Germans did board an IJN Carrier! In late May 1943. Kapitänleutnant Hoppe, Oberleutnant zur See Schrein and Matrosengefreiter Rudolf (interpreter) did spend two weeks aboard the Japanese aircraft carrier ZUIKAKU to gather information about carrier operations. They were planning on sailing with the carrier but, the Japanese plans got all thrown out of whack by the American ambush of Admiral Yamamoto. The Germans watched the training regime and a large naval air exercise and then returned to shore duties in Japan.