So let’s talk about breasts. From a statistical and linguistic standpoint, of course.
Lingerie manufacturer Triumph has released its data regarding bra cup sizes of women in Japan. While this is obviously vital internal information for running a company that produces and sells intimate apparel for women, we’re not exactly sure of the benefits of releasing it to the general public, where it will undoubtedly garner the most attention from men, a demographic with no personal need for Triumph’s products.
Nevertheless, Triumph shared with us, and so now we’re here to share their findings with you. Note that cup sizes in Japan tend to be slightly smaller than their counterparts with the same designation in America. We mention this in the interest of full exposure…uh, we mean disclosure.
Since men already spend so much time thinking about breasts, our staff doctors have informed us it would be dangerous to deliberately draw the focus of our male readers even more to them without simultaneously doing something to expand their overall mental capacity. To that end, we’ll be introducing a number of breast-related Japanese vocabulary words as we go along. These may or may not show up again on the RocketNews24 final exam, so take notes.
A Cup – 8 percent
Starting off our tour of Japan’s mammary mounds, Triumph informs us that eight percent of Japanese women make up the most petite category, who are sometimes referred to as having hinyuu, or “impoverished breasts.”
B – 23.8 percent
One size up, and we see a considerable jump, as women with B cups made up the second-most populous segment.
The standard, textbook Japanese word for breasts is mune, which just like in English, is also used to talk about the cut of chicken.
C – 26.7 percent
More women than any other segment fell into this category, keeping with C cups being what many Japanese guys perceive as moderately-sized.
While we’re on the letter C, chichi is another term for breasts, and is the word for a cow’s udders, as well. Ironically, chichi is also the Japanese word for father, although the two are spelled with different kanji characters.
D – 22 percent
Moving into the realm of the well-endowed in Japan, 22 percent of women fell into this category.
A favorite of naughty kids and dirty old men, oppai combines admiration of the form with a feeling of immaturity on the part of the speaker, equivalent to “boobs” or “boobies” in English.
E – 12.8 percent
We see a sudden drop-off in our distribution curve, as the size of the E group is only slightly above 50% that of the D group.
The direct opposite of the above-mentioned hinyuu is hounyuu, or “bountiful breasts.”
F – 4.8 percent
As we push on into swimsuit model-class, the ranks become even thinner, yielding the fewest representatives so far.
Kyonyuu literally means “giant breasts,” although since it contains the same kyo as breakout anime hit Shingeki no Kyojin, known in English as Attack on Titan, “titanic breasts” would also be an acceptable translation.
G – 1.5 percent
And finally, we come to the smallest group (in number of representatives) of all, consisting of just 1.5 percent of women.
For describing the truly oversized bust, there’s bakunyuu, the evocative term meaning “exploding breasts.”
And so ends our journey through the peaks and valleys of Triumph’s database. For extra fun, stick the percentages into your computer’s spreadsheet program, then plot the points as a connected line graph. You’ll be treated to a rudimentary outline of a breast.
Truly, nature is both mysterious and magnificent in her workings.
Statistics source: Hachima Kikou

Japanese men reveal their favorite women’s lingerie colors in survey
Size, shape, or suppleness – What does Japan want in a pair of breasts?【Survey】
Chinese restaurant gives discounts to women based on their breast size, G-cup gets 65 percent off
10 realities about life with large breasts, according to Japanese survey
Japan’s new fashion brand for large-breasted women smashes crowdfunding goal
Japan releases first official sakura cherry blossom forecast for 2026
We traveled almost 400 miles to get popcorn from this ninja machine, but do we regret it?【Photos】
Racing into our stomachs this winter are motorcycle fuel tank-shaped bento
Starbucks Japan releases new drinkware and goods for Valentine’s Day
Japan’s Valentine’s chocolate Slimes let you say you say I love you like the Dragon Quest mascot
Bear meat noodles?!? Tokyo restaurant adds a new kind of niku soba to its menu【Taste test】
Japan super budget dining – What’s the best way to spend 1,000 yen at McDonald’s?
Do Japanese women check out each other’s lingerie at the hot springs? Survey investigates
It’s naked time: An American’s first onsen experience 【Video】
Hypnosis bar opens in Tokyo, with prizes for those who don’t fall into a hypnotic state
Massive manga collaboration bringing 100 years of Shueisha manga to Uniqlo T-shirts【Photos】
Visiting Japan’s Gyarados Pokémon park in the city with a special connection to Magikarp【Photos】
Majority of Japanese women in survey regret marrying their husband, but that’s only half the story
Totoro cream puffs and Catbus cookies are finally available in downtown Tokyo
Japan’s kid-friendly ski program is now selling Pikachu snowboards for a limited time only
Starbucks Japan releases new Frappuccino and latte for Valentine’s Day
Japanese vending machine serves up unique drinks at four Tokyo train stations
McDonald’s Japan releases a Mushroom Mountain and Bamboo Shoot Village McFlurry
10 times to avoid traveling in Japan in 2026
Starbucks Japan ready to get Year of the Horse started with adorable drinkware and plushies【Pics】
Our 52-year-old pole dancing reporter shares his tips for achieving your New Year’s exercise goal
Disillusionment at Tsukiji’s tourist-target prices led us to a great ramen restaurant in Tokyo
Ramen restaurant’s English menu prices are nearly double its Japanese ones, denies discriminating
Japan may add Japanese language proficiency, lifestyle classes to permanent foreign resident requirements
Lacquerware supplier to emperor of Japan and Pokémon team up for new tableware
Japanese beef bowl chain Sukiya’s 2026 Smile Box lucky bag basically pays for itself
Survey asks foreign tourists what bothered them in Japan, more than half gave same answer
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
We deeply regret going into this tunnel on our walk in the mountains of Japan
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
Major Japanese hotel chain says reservations via overseas booking sites may not be valid
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
No more using real katana for tourism activities, Japan’s National Police Agency says
Starbucks Japan reveals new sakura drinkware collection, inspired by evening cherry blossoms
Updated cherry blossom forecast shows extra-long sakura season for Japan this year
Lingerie for girls with smaller breasts: feast’s new collection “Glossy Ribbon Mermaid” is too cute
Man’s image of the ideal female body is shockingly skinny even by Japanese standards
Japan’s Kanji of the Year for 2023 reveals the worries of Japanese society
All you need to know about Japan’s unasked-for restaurant appetizers that you have to pay for
Tokyo’s Sakeice O’Choco alcoholic hot chocolate both does and doesn’t contain “sake”
Lingerie lucky bag from Japan’s Peach John includes anime cosplay bra/panty set, maybe by accident
Leave a Reply