Japan's Cabinet approved a new set of financial sanctions against North Korea on Tuesday in response to the communist nation's missile tests in July, the government's top spokesman said.
Communist North Korea's moribund economy is heavily dependent on cash infusions from a large community of sympathetic ethnic Koreans in Japan.
Australia also imposed similar restrictions Tuesday.
The sanctions -- called for in a U.N. Security Council resolution that denounced the July launches -- ban fund transfers and overseas remittances by groups and individuals suspected of links to North Korean weapons programs.
Japan also urged China to follow suit with sanctions as allowed under the U.N. resolution.
The United States, China, Japan, Russia and South Korea have tried to persuade the North to abandon its nuclear program at six-party negotiations that have been on hold since November 2005 because North Korea refuses to attend until Washington lifts financial restrictions.