The International Atomic Energy Agency (IAEA) seeks to re-engage with North Korea and establish its presence in the country, the organization’s chief said in Tokyo on Thursday, expressing concerns over the DPRK’s de-facto possession of a nuclear arsenal.

Director General Rafael Mariano Grossi’s remarks came during a press conference after his talks with Japanese Prime Minister Shigeru Ishiba and the agency’s collection of sea water samples near the Fukushima Daiichi Nuclear Power Station following the release of treated water into the ocean.