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 meaning of your question is unclear. Japan today, is surrounded by oceans and seas.
Like Britain, Japan is an Island(s).
The question is asked backwards. Japan is a country of the Asian continent (Asia). No continents "belong" to Japan.
Japan is bordered by several bodies of water, with the nearest oceans being the Pacific Ocean to the east and the Sea of Japan to the west. Additionally, the East China Sea lies to the southwest of Japan. These oceans and seas play a significant role in Japan's climate, marine biodiversity, and trade routes.
Oceans surrounding Japan protects it from invaders and provide plenty of fish.
passing cultural ideas from China to Japan
Isolationism .
j:caquinha coco
Japan is located in the northern hemisphere. it is located on the island East of Asia.
Tokyo,japan 2000 sq.km
They lived close near the oceans of Japan