The Central Gauteng Athletics star, who has dominated the sandpit with back-to-back national victories, has decided to relinquish his crown at the Athletics South Africa National Championships from 24-27 April at Puk McArthur Stadium.
Johnson believes his future lies on the track rather than in the sand.
"The thing is, I kind of want to talk to my coach and, it's a weird thing but I feel like I should run the 100m because I want to conserve myself for the World Championships later on this year," said Johnson.
"I mean, I've won the [long-jump] title back-to-back in two years straight now, so I feel like I've done it enough, but I don't think that I shouldn't do it, I'm just trying to plan ahead because September is very far and I don't want to put too much jumps in.
"Before this, I had an injury on my ankle, so it was something I've been struggling with for years, so I don't want to aggravate anything by jumping too much, and then it starts flaring up.
"Because last year I was in very good shape leading up to the SA champs and everything, and as soon as I got to Europe, I got injured. So I've told myself, 'Less jumps and you'll be fine.'"
The 2024 Paris Olympian refutes suggestions he is turning his back on long-jump, but argues he is eager to challenge himself in other events with stiffer competition.
"History can judge me, but I'm a competitive person. I'm going to the 100m, where it's harder for me to win something, so I don't see it as I'm dishonouring anything," he defended.
"I'm going where it's tougher – I could just stay there [in long-jump] and win everything every year, but at the same time, I operate in a sport where I know I'll be pushed more, but at the same time my plan is my plan.
"If I have to chase legacies and fall behind on world championships, it's not going to matter in the end."