The correct answer is option 4, Japan. Japan is not a party to the nuclear deal clinched by Iran with six world powers. The other options, 1) USA, 2) France, and 3) Russia, are all parties to the deal.

The nuclear deal, formally known as the Joint Comprehensive Plan of Action (JCPOA), was reached in 2015 between Iran and the P5+1 group of world powers, which includes the United States, France, Russia, China, the United Kingdom, and Germany. The purpose of the deal was to address concerns about Iran`s nuclear program and ensure that it is solely for peaceful purposes.

Under the JCPOA, Iran agreed to limit its nuclear activities and allow international inspections in exchange for the lifting of economic sanctions imposed by the international community. The agreement was a significant diplomatic achievement, aimed at preventing Iran from developing nuclear weapons.

While Japan is a prominent world power, it is not part of the P5+1 group, and therefore not a party to the nuclear deal with Iran. It should be noted that Japan has expressed support for the JCPOA and has pledged to continue coordinating with other countries involved in the agreement.