Ireland were leading 12-9 when Peter O’Mahony was taken off in the 54th minute of the 2019 World Cup game against Japan.
What happened next was a disaster, as the home nation posted a converted try and added a penalty to win 19-12.
Moreover, Joey Carbery kicked to touch to end the game when the clock ticked into the red rather than setting off and hoping for an equalising score.
Ireland, reeling and ragged, were settling for a seven-point defeat which meant they were almost certainly going to have to face the All Blacks in the quarter-final.
O’Mahony might have been furious but he can’t quite recall.
“I don’t know. I can’t remember back that far. Jesus, I don’t know, I don’t know what the answer is to that, to be honest with you,” he said yesterday at the Ireland’s Captain’s Run ahead of Saturday’s encounter in Dublin.
It is hard to think of such a devastating Ireland defeat since the game went professional and nigh on impossible to think of one in the Munster canon either.
Is there another game that Peter played in that was as disappointing?
“Obviously given the stage, it was disappointing, but I’ve had plenty of disappointment in my career which I’d like to think I’ve used as fuel to improve myself and the teams I’ve been involved in.
“There are lots of teams that are very successful but have had a huge amount of games and competitions that haven’t gone their way, but it’s about learning from them and taking those lessons.
“I think that was one of the games that obviously stays with you for a long time, but you’ve got to learn and move on from it.”
Ireland have moved on, he says, so much so that World Cup game has not been studied in camp this week.
“No, we haven’t watched it. Do you think we sat down and watched the 80 minutes again like, with 13 uncapped players?”
Thus Ireland will look to blot out the past; the challenge the Brave Blossoms present is to be taken on afresh at the Aviva this weekend.
Once there, O’Mahony will be hoping those among the 13 new caps who come in will fully appreciate Irish rugby’s need to redress the balance.
“Guys have been generally quick and diligent, there has been no need to give them a long time,” he says of the group coming together just a fortnight back.
“There isn’t a time there, and as a result, you need to be up to speed as soon as possible and that’s what we’re doing to be fair.
“We have two games and just under two weeks to be prepared for two games.
“That’s the other thing about international rugby, you don’t get to do what you do with your provinces, which is
to train and get your connection like that.”
Then again, it is probably about a bit more than getting the better of Japan for those new to the international experience.
If Ireland select as expected, only Chris Farrell, Jacob Stockdale, Josh van der Flier and O’Mahony will reprise their Shizuoka roles in the Aviva.
Dave Kilcoyne, Joey Carbery and Jordan Larmour were on the bench in Japan 21 months ago and they could have a part to play too.
“Of course, there is guys at different stages here but at the end of the day, you come together to play for Ireland and that in itself deserves a huge amount of respect.
“It doesn’t matter who is away with the Lions or who is getting rested, the team picked next Saturday is the Irish national team and that deserves an incredible amount of respect in itself.
“There will guys who get chances, there will be guys there to prove points, guys who will be playing to win next Saturday and that is to perform in the Six Nations game or any other competitive game.”