中日甲午战争,海战占有十分重要地位。日本是个岛国,它要对外侵略,就必须跨海作战。因此对日本来说,夺取制海权是其达到扩张目的的重要前提。如何夺取制海权,日本政府在它的“作战大方针”中制定了三种方案。丰岛海战后,日本大本营决计实施第二种方案,即虽然不能夺取制海权,但也要使中国舰队不能驶进日本近海,日派陆军将清军赶出朝鲜, Sino-Japanese Jiawu war, naval battle occupies a very important position. Japan is an island nation, and if it wants to aggression abroad, it must cross-sea operations. Therefore, for Japan, seizing the sea right is an important prerequisite for its expansion. How to seize the sea right, the Japanese government has formulated three kinds of programs in its “guiding principle for combat.” After the Toshima Island naval battle, the Japanese camp decided to implement the second plan, that although the seaborne regime can not be seized, it is necessary to prevent the Chinese fleet from entering Japan’s offshore waters. Japan sent the army to expel the Qing troops from North Korea,