Japan has presumably extended the deadline for establishing new countermeasures against potential nuclear terrorism threats. While the exact deadline and details of the extension are not mentioned in the headline, it typically implies a need for additional time to bolster safety and security structures around Japan's nuclear facilities. This move may be indicative of potential weaknesses in the existing counterterrorism framework or increased threat levels.

Nuclear safety is a matter of intense concern in Japan due to the country's history of nuclear disasters, especially the Fukushima Daiichi nuclear disaster in 2011. Japanese society values safety and precaution heavily. Hence, any discrepancy or delay in measures that reinforce safety, especially pertaining to nuclear facilities, is closely scrutinized by the public and media.

In the US and EU, nuclear safety is also a highly prioritized issue. However, their approach may involve a robust integration of federal and local security forces, along with stringent regulations and frequent safety drills. Any delay in implementing safety measures would similarly be met with public concern.