April 15 (UPI) -- North Korea on Wednesday accused Japan of a "grave provocation" after Tokyo expressed concern about Pyongyang's nuclear and missile programs in its annual diplomatic report. Japan's Foreign Ministry said in its 2026 Diplomatic Bluebook that North Korea's weapons programs are a "serious and imminent threat" to Japan and the international community and are "absolutely unacceptable." The report, released last week, reiterated the need for the "complete, verifiable and