In Japan, a women over the age of 25 are often seen as used goods by Japanese men (Much like Christmas cake is "no good" after the 25th of December).

As a result, single Japanese women over 25 will often find a foreign partner, since Japanese men are no longer interested in them.

Solarpunk is a movement focused on a positive, ecological vision for a future where technology is used for human-centric and ecocentric purposes. It is a literary, artistic and aesthetic sub-genre and is also closely tied to eco-political activism. Solarpunk narratives have a distinctly positive and utopian foundation in contrast to the often dystopian visions found within other "punk" science fiction genres.