Evans was memorably the hero in death as Cardiff beat Leinster at Arms Park in 2022 and also conquered the Galway wind to triumph in Connacht in 2017.
The 29-year-old from Pontypridd now has a testing moment to add to his list of highlights.
“I’ve experienced it with my club, but it’s the first time I’ve done it with my country,” Evans said.
“I was pretty relieved that it was over, but that’s why you put in all those hours and hard work.”
The substitute flyhalf only entered the field in the 79th minute, with Wales trapped in their own half and needing something special.
“The more time goes by, the more you think you might not get along, but you have to be ready to impact the game,” said Evans, who replaced Dan Edwards.
“I’m the guy who’s lucky to have that moment at the end, but I was more proud of how we moved up the field.
“We held onto the ball and didn’t let it go, which we probably did for a lot of the game to give Japan an advantage.”
A penalty just out of reach meant Evans kicked to the 22-yard line and the pack all but ensured his right foot was not needed.
“The forwards were incredible with the maul and kept us going until the end; we were unlucky not to get the try.
“We thought about a quick touch, but then I took the decision away from the guys.”
Wales now prepare for New Zealand next Saturday, knowing their level of performance must improve dramatically.
“We’re going to be hard on ourselves,” Tandy said. “There is never a lack of effort every time I see this group and you can take advantage of that.
“It’s obviously satisfying to get these close wins, but we have to continue to grow.”
