The leaders of Canada and Japan voiced their support for Ukraine during visits to Kiev on Saturday, as the Ukrainian military reported another serviceman killed in separatist eastern territories following a sharp escalation in violence.
A four-month-old cease-fire has come under fresh strain from the worst fighting between government troops and pro-Russian rebels in months. Both sides accuse the other of violations, and Ukraine has warned of a possible "full-scale invasion" by Russia.
Prime Minister Shinzo Abe and his Canadian counterpart, Stephen Harper, attended the Group of Seven (G-7) summit in Germany on Sunday, where leaders were to discuss extending European Union sanctions against Russia over its involvement in the Ukraine conflict.