Vern Cotter's side kick off their campaign against Japan on Wednesday and their opponents will be flying high after an historic win over the weekend.
The Brave Blossoms beat two-time champions South Africa 34-32 in arguably the biggest upset in World Cup history but Wilson is hoping to bring them back down to earth.
"There is no easy pool, especially this one," he told the Glasgow Evening Times. "We have four very good teams that we have to play against and it changes nothing for us.
"Every game is 80 minutes and it's hard to concentrate for that full 80 minutes. No matter how well you are doing, there are always going to be a few slight lapses. That's what we will be looking for when we play Japan.
"We will be looking at breaking them down and keeping our skill set good. South Africa probably helped Japan out a bit by giving away so many penalties, so we will be looking to keep that as low as possible. We also need to play in the right areas of the pitch.
"We had spoken about them and said they are very accurate in the first three phases, which they were.
"What impressed us even more is that they carried on with that afterwards. They were still accurate five, six, seven, eight phases afterwards. That was one thing we looked at, and thought 'that is where they have definitely got better' so we have to counter that."
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