1. Ki (Introduction) - Sets up characters and situation.
2. Shō (Development) - Expands the characters and fleshes them out.
3. Ten (Twist) - Introduces a new element or change.
4. Ketsu (Conclusion) - Shows the outcome and connections between elements.
In contrast Western films usually follow a three act structure:
1. Setup - Introduces the hero, often stepping into the unknown, and establishes the initial conflict and sets the stage for the story.
2. Confrontation - The hero faces mounting challenges and conflicts, often involving threats to innocent people or community. Stakes are raised and the story progresses to a conclusion.
3. Resolution - The story culminates in a climatic confrontation between the hero and the villain. Some sacrifice is usually paid, the hero triumphs, justice is served and order returns to the community.
I grew up on Disney and the three act structure, so when I experienced Studio Ghibli for the first time with Princess Mononoke it felt very different, fresh and more mature. While I don't necessarily love all of Studio Ghibli's catalogue, I do treasure Princess Mononoke, Kiki's Delivery Service, and Porco Rosso.
In the case of Nausicaä of the Valley of the Wind, I highly recommend reading the manga over watching the Studio Ghibli anime.