redman
A 1972 tokusatsu series, very similar to Ultraman where the titular character grows in size to fight monsters. Created by Tsuburaya Productions, it aired as a 5-minute segment of the variety show Ohayou! Kodomo Show, with 138 episodes in total.
The show was considered a cult classic among some tokusatsu fans for the appallingly low budget production, monster costumes recycled from Tsuburaya's previous low budget short series Ultra Fight and non-existent plot for every episode, with its story only found in off-show material. Other than its titular character being recognized as a proposed design for the original Ultraman TV series, ever since it began restreaming, the Redman character is also known by fans as a "serial killer" due to the nature of the show, which involves the hero beating up and killing the monster for no reason, sometimes in gruesome fashion.

Pixiv
Twitter
Bluesky
Weibo
Lofter
Tumblr