The government may look into revising the Personal Information Protection Law if some of its provisions are stopping municipalities from ascertaining the status of "missing" centenarians and other pension recipients, Chief Cabinet Secretary Yoshito Sengoku hinted Thursday.

"If (the law) is impeding the investigations by local governments, we need to consider our options," said Sengoku, touching on the rising number of unaccounted-for people who, if still alive, would be over 100 years old.

As of Thursday, there were at least 45 "missing" centenarians.