Why do people create objects that resemble the human form? An object in the shape of a person - that is, a doll. It has been made in many different regions and cultures.
Dogu 土偶 https://ja.wikipedia.org/wiki/土偶
Haniwa 埴輪 https://ja.wikipedia.org/wiki/埴輪
In Japan, during the Jomon period (14,000 - 300 BC ), dolls called 'dogu’ (Dolls made of clay and hardened by baking) were created as substitutes to avoid disasters. During the Kofun period, clay figures known as 'haniwa' were crafted and buried in the tombs of rulers as substitutes for sacrifices.
Amagatsu 天児 https://www.koboku.co.jp/blog/?p=12256
Houko 這子 https://www.koboku.co.jp/blog/?p=12256
“Amagatsu” and “Houko” were created for the health of children. Both were intended to take the place of a child and transfer illness or injury. (Heian period : 794 - 1192)
Kanegon Monster in Ultraman
がま口財布（frog mouth shaped wallet）