Anime builds tension through its narrative structure by incorporating various techniques such as cliffhangers at the end of episodes, foreshadowing future events, slowly revealing important plot points, creating high-stakes conflicts for the characters, pacing the story carefully, strategically placing plot twists and surprises throughout the series, incorporating intense action sequences, emotional character development, and well-timed revelations. These elements work together to keep viewers engaged, on the edge of their seats, and eagerly anticipating what will happen next, creating a gripping viewing experience for the audience.