In the Hiroshima Report 2023, the performances of selected countries were surveyed, based on their nuclear significance and geographical distribution.
The list in cludes members of the Non-Proliferation and Disarmament Initiative (NPDI), members of the New Agenda Coalition (NAC), and states parties to the Treaty on the Prohibition of Nuclear Weapons (TPNW).

The non-nuclearnuclear-weapon states (NNWS) surveyed are partially reassessed from the previous year ’s edition. Regarding nuclear disarmament and nuclear nonproliferation, the number of countries surveyed are revised from 27 to 22 in order to enhance the survey and analysis of trends per country, taking into consideration the importance of these issues and the willingness to make proposals and implement them. In addition, with regard to nuclear security, the surveyed NNWS are limited to 18 countries that are either actively engaged in nuclear activities or possess a certain amount of nuclear material, and thus potentially pose a high risk to nuclear security. 1
The Hiroshima Report 2023 surveys the following countries.

➢ Five nuclear nuclear-weapon states under the NPT (China, France, Russia, the United Kingdom and the United States)
➢ Non-state parties to the NPT possessing or believed to possess nuclear weapons (India, Israel and Pakistan)
➢ Non-nuclear-weapon states under the NPT

・Nuclear disarmament and non-proliferation: Australia, Austria, Brazil, Canada, Egypt, Germany, Indonesia, Iran, Japan, Kazakhstan, South Korea, Mexico, the Netherlands, New Zealand, Norway, Poland, Saudi Arabia, South Africa, Sweden, Switzerland, Syria and Turkey
・Nuclear security: Australia, Belgium, Brazil, Canada, Finland, Germany, Iran, Japan, Kazakhstan, South Korea, Mexico, the Netherlands, Norway, South Africa, Sweden, Switzerland, Turkey and the UAE

➢ Other (North Korea Korea2)

 

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1 Criteria for selecting countries for the survey are those with a certain level of nuclear activities or with at least 1 kg of HEU. “A certain level of nuclear activity” include possessing or planning to possess in recent years commercial nuclear reactors in operation (cf: Turkey is scheduled to begin operation in 2023) or a spent fuel final disposal site (Finland).

2 North Korea declared its suspension from the NPT in 1993 and its withdrawal in 2003, and conducted nuclear tests in 2006, 2009, 2013, twice in 2016, and 2017. However, there is no agreement among the states parties on North Korea’s official NPT status.