A teachers' union in Tokyo says that Korea's easternmost Dokdo islets cannot be reckoned as part of Japanese territory, because there is no historical proof.
Japanese daily Sankei Shimbun reported on Friday,that the union members stated that "there is no historical proof that Dokdo belongs to Japan" going against the Japanese government's official territorial claims to the islets.
The remarks came as teachers selected new text books that will be used in Japanese middle schools next year.
The union also added that false information about the Dokdo islets may foster unhealthy nationalism among local students.

Dokdo is just a rock. Why fight over it?

It's not about the rock. It's about the surround waters with natural resources.

the ts post had already included in the first post - unhealthy nationalism. that is the biggest reason behind most reactions, beyond reasons, and beyond the resources available as highlighted by kaizen.