It’s time to look at breasts (statistically).

Japan, as a nation, spends a lot of time thinking about breasts, but that’s to be expected for Triumph International Japan. As one of Japan’s largest lingerie manufacturers, it behooves Triumph to keep abreast of bust-related developments in Japan, and the company annually publishes a Lingerie White Paper which compiles and examines breast-related numerical data.

The latest edition of the report, compiled from data collected in 2018, has just been completed, and Triumph has shared the results of breaking down its annual sales data by bra size.

● A cup: 2.1 percent
● B cup: 17.9 percent
● C cup: 26.9 percent
● D cup: 26.3 percent
● E cup: 18.8 percent
● F cup: 6.4 percent
● G cup or larger: 1.6 percent

Due to rounding (of the statistical, not mammary, sort) the total doesn’t add up to an even 100 percent, but comparing the 2018 data to that from previous years shows noticeable growth in the D and E-cup categories.

● D cup (2017): 25.5 percent
● D cup (2016): 25 percent
● E cup (2017): 18.2 percent
● E cup (2016): 17.2 percent
● F cup (2017): 6.6 percent
● F cup (2016): 6.6 percent
● G cup or larger (2017): 1.6 percent
● G cup or larger (2016): 2.3 percent

To further illustrate the growth, in 2018 53.2 percent of Triumph’s sales were in D-cup or larger bras. That’s a 2.1-percent increase since 2016, when D or larger sales were over 50 percent of the total for the first time ever in the history of the Lingerie White Paper, but the even more startling change comes when you go further back and compare the latest figures to those from 1990 or even 1980, the first year Triumph published its Lingerie White Paper, and see that the proportion of D or larger cups has increased more than 10 times over the last 38 years.

● D cup or larger (2018): 53.1 percent
● D cup or larger (1990): 17.6 percent
● D cup or larger (1980): 4.5 percent

▼ Chart showing Triumph’s bra sales by year (1980 on far left, 2018 on far right)
Red: A cup, Orange: B cup, Beige: C cup, Yellow: D cup, Green E cup, Blue: F Cup, Gray: G cup

It’s worth noting that Triumph is a mainstream intimate apparel manufacturer, and doesn’t necessarily have a reputation for catering specifically to large-breasted women in a way that would significantly skew its sales towards larger cup sizes. The company itself hasn’t publicly speculated on what’s causing the sustained growth, but popular opinion credits it to higher-protein, more nutrient-rich diets in modern Japan, which sounds like a more plausible explanation than breast-enhancing massage treatments.

Sources: Livedoor News/Fashion Snap via Jin, PR Times
Top image: Pakutaso
Insert images: Pakutaso, PR Times
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