Akatsuki, a group of rogue shinobi in Naruto, was initially founded by Yahiko with the goal of achieving peace. After Yahiko's death, Nagato took over as leader under the name Pain. The group's first move in the series came late as they were busy gathering Jinchuriki, individuals with tailed beasts sealed inside them. They aimed to use their chakra to gain power and control nations. Additionally, they were strengthening their group by recruiting S-rank shinobi. The Hidden Leaf Village's defenses made it difficult for Akatsuki to enter unnoticed.
Their strategy involved starting with capturing Jinchuriki with one tail, working their way up to the nine tails. Ultimately, these factors contributed to the group's delayed participation in the series.