In Japan, there are numerous comics, games, and cartoons that depict females with exuberantly large breasts. So common is this image that your average run of the mill female character has an average cup size of C or larger. Japan is known for it’s many sexual kinks, some of which actually have formal names. Listed below are the actual names to classify the various sizes of breasts and to which the large-breast-obsessed community as a whole now go by.
Oppai – breasts (tits)
Nyū “milk” (乳 – lit: milk)
This is milk defined as any fluid that is expressed from the mammary glands of mammals. It is not to be confused in definition with the milk that you buy from the store, that would be gyuunyuu “milk” (牛乳 – lit: cow milk). The second meaning of Nyuu, which is “breast”, refers to the milk producing glands of mammals, not human females specifically. Although the term may work adequately standing alone to define breasts, most Japanese would use “oppai” instead.
Kyonyū “large breasts” (巨乳 – lit: very large milk) E cup – G cup
alt Ookii Oppai formal wording for “huge breasts” (大おっぱい – lit: huge tits)
alt Dekapai vulgar wording for “huge breasts” (でかぱい – lit: huge tits)
Describes breasts that are larger than the average range of big breasts where one would be inclined to say “very busty” or “really big”, but are still within the boundaries of normal female development (depending on genetics). It’s fairly uncommon for slender/petite women to be in this range, but one thing to note is that while the breasts themselves may not be exceptionally large, they are considered very large for the stature of female they are on. Some examples would be:
Susu_Jpg
Bakunyū “exploding breasts” (爆乳 – lit: exploding milk, bursting milk ) H cup – Q cup
This range categorizes breasts that are at the extreme end of practicality. Breasts this large are almost the size of the female’s own head and are extremely rare on slender/petite females. These sizes are either attained through cosmetic surgery or is the result of mild Macromastia, a desirable genetic disorder that causes abnormal breast growth. This often applies to gravure idols, pin-up models and porn stars who benefit career wise from having breasts that are well above average. A few noted women in this rage are listed below.
Natural:
Kaho Shibuya – 36H cup
September Carrino – 34K cup (before reduction)
Hitomi Tanaka – 34O cup
Anri Okita – 34O cup
Augmented:
Penelope Black Diamond – 30H cup
Minka XXX – 30P cup
Chounyū “ultra-breasts” (超乳 – lit: ultra milk) Q cup – Infinity ∞
This category classifies breasts so large that they rival the woman’s own body weight and stature. Breasts in this size range are light years outside anything normal and are the result of either extreme gigantomastia, extreme augmentation, or just plain imagination. For the naysayers, listed below are actual women with breasts this massive, proof that what some consider “unrealistic” actually exists.
Natural: (extremely rare and very extreme cases of diagnosed Gigantomastia / Virginal Hypertrophy)
Angelique Mwisi – Congo
Xiao Wei – China
Pilma – Phillipines
Julia Maria Manihuari Yahuarcani – Peru
Isabelle Lanthier – Quebec, Canada
Sources:
http://www.macromastia-gigantomastia.com/
https://titsintops.com/phpBB2/index.php?threads/the-biggest-gigantomastia-tits-ever-literally.29341/
Augmented:
Beshine (aka Mayra Hills) – 32Z cup
Chelsea Charms – Z cup
More info:
Here’s a site with more info on breast related categories. Even those that are not in the purview of this site. Note: some info may vary from my interpretations.