Recently in Japan, reports circulated that Iran was training dolphins to act as underwater mine detectors; accusations that the Iranian Embassy in Tokyo swiftly denied. These rumors arose amid heightened geopolitical tensions, with no specified timeframe. The Iranian Embassy slammed these allegations as baseless, further underlining Iran's commitments towards peaceful relations.

Japan, despite its pacifist stance, is deeply concerned about security issues due to its geopolitical location. Fake news that potentially affects national security or diplomatic relations gets a strong reaction from Japanese citizens who are highly reliant on official news sources. A potential threat from geopolitical tensions, especially involving a Middle Eastern country like Iran further heightens tensions.

Similarly, in the EU and US, such allegations would cause significant public concern and potential diplomatic tensions, given both territories are active global powers with interests in maintaining peace and stable relations. However, misinformation would be more robustly countered due to more diverse and scrutinizing media landscapes.