Yes, Japanese bra sizes are different from sizing systems used in other countries, notably the United States.
While both Japanese and U.S. bra sizing systems use cup size and underbust (band) size measurements, the specific way these measurements translate into labeled sizes differs, particularly for cup sizes.
According to the provided reference, "Bras in Japan are measured by cup and underbust (band) size." This confirms the measurement method is similar. However, the reference also states, "For cups, it's best to go up one or two sizes." This indicates a key difference in the cup sizing scale.
Here are examples of how cup sizes might convert from U.S. to Japanese sizing, based on the reference:
- A U.S. A cup becomes a Japanese B cup.
- A U.S. B cup becomes a Japanese C cup.
- ...and so on.
This suggests that for the same physical breast volume, the corresponding cup letter is typically one size higher in Japan compared to the U.S. sizing.
Understanding these differences is crucial when purchasing bras in Japan or converting your size from another country to ensure a comfortable and accurate fit. While the underbust measurement is also used, the reference specifically highlights the need to adjust cup sizes.
