She's very keen to learn about Japanese culture.

她渴望学习日本文化。

She speaks no Japanese and is unfamiliar with Japanese culture.

她不说日语并且不熟悉日本文化。

Japanese culture has borrowed heavily from China.

日本文化借用了中国的许多东西。

In Japanese culture, soy is not the main thing on the plate.

但在日本文化中，大豆并不是餐盘里的主体。