Japan 13-35 Ireland, Ajinomoto Stadium
Garry Ringrose, Josh Van der Flier and Kieran Treadwell all scored tries for Ireland in the first 20 minutes as they raced to 21 points. Jumpei Ogura penalty in the 14th minute meant the home side were trailing by 18 points at the end of the first quarter.
Japan finally manged to get one past the line when Kotaro Matsushima overcome defence from Marmion in the 23rd minute. However, it was the visitors, who ended the first half in a dominating position after skipper Rhys Ruddock strolled past the post and Paddy Jackson was spot on with his fourth conversion.
At half time, Ireland had a 8-28 lead and it remained intact at the end of the third quarter where both the teams failed to add a point. Although, Japan came close to scoring their second try but a video review showed Yutaka Nagare had knocked-on before going past the line.
Winger Akihito Yamada's try in the 61st minute reduced Japan's trail to 15 points but it went in vain as Sean Reidy scored the fifth try for Joe Schmidt's men in the 77th minute to complete a 22 point victory.
Ireland now have won all seven of their games against Japan.