The Selecao boss believes performances like the victory over the Samurai Blue will lead to more consistent selection going forward.
Two goals from Neymar were sandwiched between strikes by Paulinho and Kaka, and the 50-year-old Menezes explained that his side is getting close to becoming a perfect team.
"We've been working on finding an ideal selection. Selection has been found gradually, because we had some problems along the way, but we are moving towards what we imagined," he told the media in a post-match press conference.
The team scored 10 unanswered goals over the course of the week after following up Friday's 6-0 win over Iraq with the win against Japan, and Menezes believes that the 2014 World Cup hosts will soon have a regular nucleus of players from which the starting XI will be selected.
"Selection now passes to a stage in which the dropping of a player and another coming in will not change the performance. It happened with the departure of Marcelo in this game. The selection is starting to become consistent. That's the idea, maintaining the majority of players being chosen."
Kaka, who returned to the Selecao after an elongated absence, was in a buoyant mood as he celebrated his first international goal in more than two years against Iraq and followed it up with another goal to cap the Japan victory.
"I contributed to the results of these two friendlies and had a longer run-out," he told Globo TV. "I contributed a lot and I hope the fans enjoyed it. I want that to happen more often. I don't want to be picked sporadically. I want to give myself an advantage to gain more call-ups."