Japan will lead discussions at July's Group of Eight summit on the North Korean and Iranian nuclear standoffs and on strengthening the nonproliferation framework, Foreign Minister Masahiko Komura said Tuesday in a biennial report on disarmament. The 2008 white paper on disarmament and nonproliferation also criticizes China's failure to provide an adequate explanation of its antisatellite test in January 2007, reiterating Japan's concerns and calling for greater transparency of its military capacities.