COPENHAGEN — A Japanese university student who attended the climate talks here as a member of an international nongovernmental organization says everything at the conference was a learning experience, even if he was disappointed with the outcome.

Jun Matsumoto, 23, a Waseda University senior and member of the International Youth Climate Movement, now believes Japanese people should try harder to foster a sense of responsibility as global citizens, with more involvement by young people.

After sharing a slice of two weeks' worth of political wrangling over a common global challenge, Matsumoto said he feels Japanese people in general are behind in this regard, and this needs to change.