The US government has reportedly issued a prohibition on the Iranian delegation using Costco during their diplomatic visits. This unusual measure is believed to be part of a tightening of restrictions on the Iranian representatives' movements and activities inside the United States. The timing and reasoning behind this specific ban remain unclear.

Japan has strong diplomatic and commercial ties with both the United States and Iran. Japanese citizens generally advocate for peaceful dialogues and negotiations in international relations. News like this often sparks discussions on the complexity of international politics and diplomacy.

In the US and EU, restrictions on foreign delegations are not unheard of, especially in cases relating to countries under sanctions. However, this scenario, involving a specific retail corporation like Costco, is seen as somewhat unusual.