Heisei era is the period of time in Japanese history when Emperor Akihito was ruler, this era started in 1989 and lasted until his abdication in 2019.

When referring Kamen Rider, Heisei era refers to the time between 1998 (the death of Shotaro Ishinomori (the creator of Kamen Rider)) to 2019 (the last episode of Kamen Rider Zi-O)