If (1) you don’t have a Japanese passport, (2) you are not in Japan now, and (3) you have traveled to India, Nepal, or Pakistan recently, you need to get back to Japan REALLY quick or plan on being out of the country for a while. The article says this is effective Friday. I’m pretty sure that if someone is trying to get through customs after midnight Thursday, they will be sent back. – Kirk

P.S. Note that this applies to foreign residents, including people who are married to Japanese citizens.