In Japan, what legume trails only the Adzuki bean in overall popularity?

Answer

Soybean

The Adzuki bean, or Vigna angularis, holds a very high status in Asian culinary environments, especially within Japan. This status is second only to that of the soybean in terms of widespread consumption and popularity in the region. This high regard indicates the Adzuki bean's deep integration into the dietary culture, even surpassing other common legumes used in Asian cuisine.

In Japan, what legume trails only the Adzuki bean in overall popularity?
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