|Affiliation||Hayabusa Ninja Clan|
|Debut||Ninja Gaiden: Dragon Sword|
Ninja Gaiden: Dragon Sword
A scholar of the Ninja Arts, it isn't uncommon to find him with a book in each hand. Even the adults in the village acknowledge his intelligence, which he uses to assist Ryu. Denroku's a poor swordman, but he wants to be of help.
- In Hanamaru's Diary, he writes that he found at the back of one of the books that Denroku reads has a sketch of a purple-haired girl, probably signifying some sort of affection or crush from Denroku toward Ayane.