Zettai ryōiki

The ideal zettai ryōiki ratio for the length of the miniskirt, the exposed portion of thigh, and the over-knee part of the socks is 4:1:2.5, with a tolerance of 25%.

[8] The Neon Genesis Evangelion manga also gave a shortened version of the term, Zettai Ryōiki, in furigana next to the words "A.T. Field".

Japanese advertising agency WIT launched a campaign in 2013 which paid women to wear temporary tattoos on their upper thighs promoting various products and media.

[11] On February 8, 2014, a specialty shop named Zettai Ryōiki dedicated to overknee socks and tights opened in Akihabara, Tokyo.

[12][13] On February 13, 2006, the Japanese company Banpresto, which produced video games based on Neon Genesis Evangelion, filed two applications for registration of the term Zettai Ryōiki as a trade mark.