Kyokujitsu no Kantai

In Kyokujitsu no Kantai, Japan builds up on its success in the earlier series by expanding its blue-water capabilities to reach the Atlantic Ocean, challenging the Kriegsmarine in the process. Nazi Germany also launches a surgical strike on the White House and the Japanese fleet repels a German invasion of Britain.

Source: http://en.wikipedia.org/wiki/Konpeki_no_Kantai