Japan v Ireland: Hosts confirm dates for Tests against Ireland in summer of 2017
Ireland's two Test matches in Japan next summer will be played on 17 and 24 June.
Venues and kick-off times will be confirmed for the matches early next year.
Ireland defeated the Brave Blossoms 47-18 in the last meeting between the teams in 2005.
Japan caused a huge upset by beating South Africa in the 2015 World Cup and were narrowly beaten by Wales in Cardiff last month.
The second of next summer's matches will be played on same day the Lions take on New Zealand in Auckland.
Japan, 11th in the world rankings, will play Romania on 10 June before facing the Irish.
Ireland recorded comfortable victories during a two-match tour 11 years ago.