Seiryu is a document found in Onimusha: Warlords. It is a set of four books of the same name that gives small details about the Oni clan, while also being used to decode a corresponding Puzzle Box.
Acquisition[]
The first book is found in the Underground Temple hallway within a closed cabinet.
The second book is found on the 3rd floor of Inabayama Keep immediately following Yumemaru's kidnapping by a Three-Eyes.
The third and fourth books are both found in the safe room immediately before the roof of the Inabayama Keep.
Contents[]
The clan of Ogres subverted by the demons has granted a man their power. This brave and powerful man also bears a grudge against the demons.
Gallery[]
The full text for Seiryu
The answer to the Seiryu Puzzle Box