Japan receives Deutschland-class diesels

What if Japan obtained the diesels and gearboxes used in the Deutschland class?

Japan would gain little operationally and might judge its own machinery superior, while the fuel problem remained unchanged.

Deutschland-class machinery would leave Japan's fuel-oil shortage unresolved. Its maintenance demands are another reason the transfer is treated sceptically. A possible Japanese response is to improve the gearbox and offer that version back to Germany. Once the timing is clarified as the late 1920s or early 1930s, the replies question whether Japan would consider the German equipment an improvement over its own.