I am a real world pilot and this depends on weather conditions, flight plan weather or not you are restricted from flying over certain areas and if you make stops in other destinations along the way.
Japan does not have any continents in it. It is a country and it is in the continent of Asia.
The Oceans
The meaning of your question is unclear. Japan today, is surrounded by oceans and seas.
The richest continents in terms of GDP and wealth are usually North America, Europe, and Asia. These continents are home to many developed countries with strong economies, advanced infrastructure, and high standards of living. However, it's important to note that wealth distribution varies within each continent, and not all regions or countries within these continents are equally wealthy.
Like Britain, Japan is an Island(s).
Oceans surrounding Japan protects it from invaders and provide plenty of fish.
passing cultural ideas from China to Japan
j:caquinha coco
Isolationism .
The question is asked backwards. Japan is a country of the Asian continent (Asia). No continents "belong" to Japan.
They lived close near the oceans of Japan
Japan is located in the northern hemisphere. it is located on the island East of Asia.