This strange orc identified himself as a Watchman and an ally of Hogon. He has tasked the party with opening the way to the Darklands, or else he will attempt to do so himself – at the side of the orc invasion.
According to Katsutoshi, the orc army will invade during the coming winter, in the month of Kuthona.
He also revealed the existence of a strange and powerful creature known as an aboleth, working in the Darklands. He believes it is a threat that must be stopped at any cost.
Once you obtained access to the Darklands, Katsutoshi volunteered to follow you inside.