Sakon of Darkness

The eight swords made by the master craftsman Gensai had hidden in their brim the secret of Taiko, Toyotomi Hideyoshi. After Taiko's death, Sakon, a ninja who once served the Toyotomi family, goes out of his way to recover the sword, which was passed into
the hands of various master swordsmen, using disguises, stealth operations, and great maneuvers!