Kamen Rider Zi-O aired in Japan from 2018 to 2019 as the final series of the Heisei era, following Sougo Tokiwa, a teenager who can transform using the powers of past Riders. Like most tokusatsu shows, each episode ended with a short next-episode preview, known in Japanese as jikai yokoku, narrated over dramatic music to tease the next story. Those previews became familiar to international fans through subtitled uploads and clips shared online, and they are still reused in edits because the format instantly reads as a classic Japanese television trailer.