Throne of Blood

Generals Miki and Washizu are Samurai commanders under a local lord, Lord Tsuzuki, who reigns in the castle of the Spider's Web Forest. After defeating the lord's enemies in battle, they return to Tsuzuki's castle. On their way through the thick forest surrounding the castle, they meet a spirit, who foretells their future. The spirit tells them that today Washizu will be named Lord of the Northern Garrison and Miki will now be commander of the first fortress. She then foretells that Washizu will eventually become Lord of Spiderweb Castle, and finally she tells Miki that his son will also become lord of the castle.
When the two return to Tsuzuki's estate, he rewards them with exactly what the spirit had predicted. As Washizu discusses this with Asaji, his wife, she manipulates him into making the second part of the prophecy come true by killing Tsuzuki when he visits. Washizu kills him with the help of his wife, who gives drugged sake to the lord's guards, causing them to fall asleep. When Washizu returns in shock at his deed, Asaji grabs the bloody spear and puts it in the hands of one of the three unconscious guards. She then yells "murder" through the courtyard, and Washizu slays the guard before he has a chance to plead his innocence.