Japan and the rest of the G7 want to tighten the noose around Russia's war machine. They have called on what they call "third parties" to end all material support for its invasion, or face "severe costs."
Japanese Cabinet Secretary for Public Affairs Shikata Noriyuki spoke to NHK World on Friday.
He echoed the G7's joint statement, vowing to mitigate Russia's illegal actions. He said the G7 leaders wish to strengthen measures against Russia, by closing the loopholes used to get around sanctions.
Outside of G7 countries, military assistance and other sensitive technologies could still be transferred to Russia.
He emphasized the leaders of Japan and Ukraine are coordinating closely, and want to send a strong message to Russia from Hiroshima.