Four Japanese high school students working as "peace ambassadors" for the abolition of nuclear weapons have pledged to inherit the wishes of atomic bomb survivors for a world free of nuclear arms.

The four activists from Nagasaki, Hiroshima and Kumamoto prefectures spoke to reporters on Saturday, one day after they returned from Norway.

They traveled to the country with members of Nihon Hidankyo, a Japanese group of atomic bomb survivors, or hibakusha, which won this year's Nobel Peace Prize.

The students attended the award ceremony in Oslo and a discussion with young people.

Tsuda Rin, whose grandfather is a hibakusha, spoke about the reactions of local audience members to a speech delivered by Nihon Hidankyo's co-chairperson Tanaka Terumi at the ceremony.

Tsuda said she saw many people listening to Tanaka's speech with tears in their eyes, which is when she realized the hibakusha's stories touched the hearts of so many people.

She added that she wants to continue the peace activities so as to convey the hibakusha's thoughts and experiences.

At the discussion with young people, Tsuda introduced the activities of the high school peace ambassadors.

She said it was encouraging when the audience members shouted "Yes" to the ambassadors' slogan "Weak, but not powerless" and applauded.

She said the encouragement meant a lot for her as she sometimes feels powerless when she hears people say that high school students will never be able to change the world.

The four students are expected to hold meetings in their home prefectures to report on their experiences in Norway.