二十歳

1. Origins, structure, and basic meaning

• Structure: 二十歳 means twenty years old and is read as the whole word はたち here.
• Basic usage: Use it for turning twenty or experiences around that age.

2. Common pitfalls and similar expressions

• Age and duration
  • 二十歳 is an age, while 二十年 is a duration of twenty years.
• Turning twenty
  • In the example 二十歳になります, に marks the age being reached.