Why is there the terretorial dispute about Takeshima Island between Japan and Korea?

  Isn't there any solution of trritorial dispute about little islands around Japan?  Today, a group of people from Tokyo prefecture went to Senau Islands by boat to survey the islands which China insists soveregnty over. When the world War II ended, Japan had to give away the islands Japan had taken over and occupied by force. But by the San Fransisco Peace Treaty, some little islands located around Japan were not clearly decided which country they belonged to. They were Takeshima Island, Senkaku Islands and some northern islands. How can we decide which country they belong to ?  I am afraid these kinds of territorial disputes have often developed into war.
  Today, I didn't go anywhere but went with Ayako to see a little "autumn festival" being held in Toyokawa cho, along my regular walking path "Komorebi no mori". We walked seeing little stands along the walking path, and bought pizza for lunch and came home.