Multiple reports cite estimates from the Ukrainian government, as described by The New York Times, that indicate a large share of Russian missiles and drones include components manufactured in Japan. The figure mentioned is that roughly 90% of such weapons contain Japanese-made parts. The reporting describes the claim in the context of ongoing Russian military strikes and Ukraine’s assessment of foreign component supply chains. It also frames the issue as part of a broader scrutiny of how specific industrial components—rather than complete weapons systems—may be ending up in Russian arsenals despite international efforts to restrict technology and materiel flows. The accounts do not, in the available summaries, provide detailed documentation on how the components are sourced, the exact component types involved, or the specific entities responsible for the supply. They also do not offer an account from Russian or Japanese authorities within the provided text. Overall, the sources converge on the central allegation: Ukrainian estimates, relayed by international media, suggest that Japanese parts are present in the vast majority of Russian missiles and drones examined.