Kamen Rider Zi-O (仮面ライダージオウ Kamen Raidā Jiō) is a Japanese tokusatsu drama in Toei Company's Kamen Rider Series. It is the twentieth and final series in the Heisei period run and the first series in an currently unknown new era and the twenty-ninth series overall. The series started on September 2, 2018, joining Kaitou Sentai Lupinranger VS Keisatsu Sentai PatrangerIcon-crosswiki in the Super Hero Time line-up after the finale of Kamen Rider Build.
The tagline of the show is "Go beyond space-time!" (時空を超えろ！ Jikū wo koero!). Much like Kamen Rider Decade, it commemorates all of the Heisei-era Kamen Riders to date.
Plot
KR Heisei 20th Slider
Heisei Kamen Rider 20th Anniversary logo
"The Heisei Kamen Riders have passed through this era. It's time to pass that power down to the future. Rejoice at the birth of the new king!"
―Opening narration by Rikiya Koyama.[src]
In the fall of 2018, a time machine appears before Sougo Tokiwa, a high schooler that has always dreamed of becoming a king. Then, Tsukuyomi appears from the time machine, telling the hero “I come from the year 2068, a world without hope where the Oma Zi-O, the king of time reigns supreme.” She has come from the future in a desperate effort to change her own time. She then gives the hero an ominous warning “You will become Kamen Rider Zi-O, King of Time, the overlord destined to rule the world.” Can this really be the hero’s fate? This is the story of a Kamen Rider who would be king, who will fight to save the past, present, and future, encountering the various Heisei Kamen Riders throughout space-time.
