- Who
- Sazae-san
- What
- 53:100 year(s):day(s)
- Where
- Japan ()
- When
The longest-running anime series in Japan is Sazae-san, which is based on the yonkoma manga of the same name by Machiko Hasegawa. The series has been airing since October 1969, with 2684 episodes as of 22 January 2023.
