Niko Niko Republic

Nikoniko is a minor character in the series Hetalia: Axis Powers.
Nikoniko is a micronation that became independent from Japan in 1982, but integrated back in 2006
He was once a micronation located in Dakeonsen, a section of the city of Nihonmatsu in Fukushima Prefecture, Japan; which puzzled Japan quite a bit.
He then quit being a micronation when he became upset about not being able to age and that his overall physical wellbeing depended on the economy. He eventually stepped down from being a nation to live as a normal human, and eventually married and became a father.

(Source: Hetalia Archives)