The U.S. has enacted a ban on 'birth tourism,' a practice where non-U.S. citizens travel to America to give birth, thus securing American citizenship for their children. This move came through a presidential decree, as stated in the headline. This practice has been a controversial topic in U.S. immigration debates, with opponents arguing that it's a loophole for seeking citizenship. The precise impact on Japan, one of many countries where citizens have used 'birth tourism,' will remain to be seen.

In Japan, the concept of 'birth tourism' has been attracting attention as more Japanese travel overseas for this purpose. The move by the U.S. could potentially limit such options for Japanese parents aiming for dual citizenship for their children. Dual citizenship is a topic of debate in Japan, as it triggers difficult discussions around national identity, loyalty, and benefits in a rapidly globalizing world.

While the U.S. has banned 'birth tourism,' the European Union does not have a comprehensive policy on this issue. Instead, its individual member states decide, with some allowing and some not. The EU's varied approach contrasts with the U.S.' stringent new nationwide policy.