Japan will beef up its immigration controls following the attempt by a man believed to be the elder son of North Korean leader Kim Jong Il to enter the country on a forged passport, Chief Cabinet Secretary Yasuo Fukuda said Monday.

During a morning ministerial meeting, Prime Minister Junichiro Koizumi ordered the number of immigration control officials to be increased by 10, the top government spokesman said.

Koizumi also ordered the installation of equipment including surveillance cameras as a way to tighten immigration controls, Fukuda said.