Kantai Kessen would not dictate a European naval war

Would Kantai Kessen, Japan's decisive-battle doctrine, shape Allied tactics in Europe?

Not directly. Japanese units would enter an established British command system, while the doctrine's attritional elements fit European operations better than its final battle near Japan.

Kantai Kessen combined preliminary attrition with a decisive fleet battle near Japan. Submarines and aircraft would weaken an approaching enemy until Japan could concentrate superior strength for the final engagement. That plan assumed an opponent such as Britain or the United States, while the Italian fleet was already smaller than Japan's. Japanese units entering European waters would also join British commands that already had their own operational plans. Their carriers and submarines could contribute to blockade and attrition without transplanting the entire Pacific campaign concept.