An Omi Alliance officer, who was a former lieutenant of one of its subsidiaries: the Go-Ryu Clan, before its dissolution in 2006.

He dislikes Ryuji Goda as the Go-Ryu's patriarch by virtue of being the son of the Omi's fifth chairman, Jin Goda, while Takayama had to spend years serving Jin to attain the same rank. Despite his enmity with Ryuji, the two share a similar Darwinist belief, where power should belong to those who have the strength to seize it, thus Takayama views himself as an ideal candidate for the next chairman of the Omi Alliance.

Following Ryuji's demise and the Go-Ryu's collapse, Takayama was demoted to a regular officer of the Omi, turning to traditional petty crime and shakedowns behind the scenes of other major conspiracies that unfolded since then...

One shop he harassed in particular was the Ebisu Pawn branch of Sotenbori.