Aerial view of Rokkasho-mura reprocessing plant, Japan. The Rokkasho-mura reprocessing plant in Japan is to be the largest source of radioactive krypton-85. 'Never before has nuclear operator planned to deliberately release such a vase quantity of this gas.' (Shaun Burnie, Greenpeace International) After ten days of sampling around Rokkasho-mura on the Pacific coast and throughout Aomori Prefecture and collecting background atmosphere samples in the Prefectural capital, Greenpeace issues a challenge to Governor Kimura and the the nucear facilities owners, Japan Nuclear Fuel Limited (JNFL), calling for full disclosure of the plant.