納豆

1. Origins, structure, and basic meaning

• Structure: 納豆 (なっとう) is a noun for Japanese fermented soybeans characterized by stickiness and a strong aroma.
• Basic usage: 納豆をご飯にかける makes the food a topping for breakfast rice, while 納豆は混ぜると粘りが強くなる makes its changing stickiness the topic.

2. Common pitfalls and similar expressions

• Food object and property after stirring
  • 納豆をご飯に clearly distinguishes natto from the rice receiving it, while 納豆は introduces a general property of the food. The stickiness itself is not the meaning of the noun.