Cabinet members Friday voted to introduce stricter measures at airports, railway stations, U.S. military bases, Japan Self-Defense Forces facilities, nuclear power plants and the World Exposition site in Aichi prefecture, the Asahi Shimbun reported Friday.
Additional guards have been stationed at embassies and other diplomatic facilities of G8 countries. Immigration bureau inspectors have been conducting stricter checks at airports to catch those with forged passports. Justice Ministry officials said passengers from Britain will be subject to thorough inspections.
"We cannot say that there are no people in Japan who could work as terrorists," Chief Cabinet Secretary Hiroyuki Hosoda told reporters. "Because those people could cause similar attacks in Japan, we must take precautions."
Prime Minister Junichiro Koizumi, attending the Group of Eight summit in Gleneagles, Scotland, expressed outrage after four bombs exploded in London Thursday.
"I cannot contain my strong indignation at these terrorist attacks, which must never be tolerated," Koizumi said in a statement.