Oleksandr Karavaev ghosted into the penalty area to thump home a 69th-minute winner after a strong run down the left by Yevhen Konoplyanka to seal victory for Ukraine, who missed out on qualifying for this year's World Cup in neighbouring Russia.
Ukraine took a 21st-minute lead when Yaroslav Rakitskiy‘s long-range shot took a deflection but Japan were level at halftime after a glancing header by Tomoaki Makino from a 41st- minute free kick.
The Japanese used Standard Liege’s stadium as their base for two warm-up games having snatched a last-gasp draw with Mali on Friday.
Japan play Colombia in their opening World Cup game in Saransk on June 19 before taking facing Senegal and Poland in Group H.
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(Reporting by Mark Gleeson in Cape Town; Editing by Ed Osmond)
