The Sakura Empire is a nation based on the Imperial Japanese navy.
Unlike the Eagle Union or the Royal Navy, the Sakura Empire has very few ships that can be built by ship building. However as most of the chapters enemy ships and bosses belong to the Sakura Empire, almost the entire Sakura Empire fleet can only be obtained as drops.
As a fleet they have some powerful torpedo focused ships. Their destroyers have very high torpedo stats and Yudachi has incredibly powerful burst damage in part due to it. While even their Heavy cruisers Takao and Atago get the chance to fire two waves of torpedoes with each launch.
Their larger aircraft carriers also have a special based on their historic carrier division at the end of 1941. As such pairing Akagi with Kaga or Souryuu with Hiryuu they get a powerful offence buff.
Due to these features, using a full Sakura Empire fleet can be difficult but rewarding.