The Japan Rugby Football Union has confirmed the dates of Ireland's two Tests against the Brave Blossoms in June 2017.
The first Test will take place on Saturday 17 June with the second Test following a week later on Saturday 24 June. Venues and kick off times will be confirmed in early 2017.
Japan recorded one of the most memorable victories in Rugby World Cup history when they defeated South Africa 34-32 in Brighton at Rugby World Cup 2015.
The Brave Blossoms, who stand in 11th position in the World Rugby rankings, came close to a famous result against Wales at the Prinicipality Stadium in November where they lost 33-30 to a last minute drop goal.
Japan will also play Romania on Saturday 10 June before the two Tests against Ireland.
Japan head coach, Jamie Joseph, said, "Romania will be a first experience for a lot of the players and staff come June 2017. None of the coaching staff and many of the players have yet to experience playing the Romanians who are renowned to be very physical opponents.
The match precedes 2 test matches v Ireland and will be 1 of 3 great test matches for the new Japan team."
Japan RFU will confirm match venues and times in due course with ticket information being announced after March 2017.
Ireland 2017 tour of Japan:
17 June 2017: Japan v Ireland
24 June 2017: Japan v Ireland