Author Kiichi Kosuzu announced on his Twitter that his light novel Saikyou Onmyouji no Isekai Tenseiki anime adaptation in progress.
Synopsis
Haruyoshi, the strongest of the onmyoji, was on the verge of death after being betrayed by his companions. Hoping to find happiness in the afterlife, he attempted the secret reincarnation technique and was sent to a different world! Born into a family of magicians, the magic he didn't inherit was nothing compared to his previous abilities as an onmyoji.
Kosuzu began publishing the Saikyou Onmyouji no Isekai Tenseiki novel on the Shousetsuka ni Narou in December 2018.
Finally, the most recent update to the novel was in April 2021.
Source: ANN