Japan on Monday urged North Korea to commit to its promises made under the February 13 agreement at the six-party talks to shut down its nuclear facilities.
The Japanese government called it "extremely regrettable" that Pyongyang failed to meet the Saturday deadline, which was set by the US, China, South Korea, Japan and Russia.
Japanese Chief Cabinet Secretary Yasuhisa Shiozaki said it was not appropriate to introduce a new deadline but Japan had no plan to impose additional sanctions against Pyongyang.
Japan April 10 introduced six-month extensions to its sanctions, which include bans on imports from North Korea, use of Japanese ports by North Korean ships, entry of North Koreans into Japan and exports of luxury goods to North Korea.
An initial package of restrictions was imposed in July last year after North Korea test-fired seven missiles into the Sea of Japan. Japan strengthened them in October after Pyongyang conducted its first nuclear test.
North Korea was to have shut down its nuclear facility Saturday and allowed International Atomic Energy Agency inspectors back into the country in return for energy aid on condition that the funds at a Macao bank were released.