The Internet spread rapidly in the 1990s.
Researchers are investigating the date of this earthenware.
age group; generation; age range
Used for groups of people by age, often in phrases such as 幅広い年代, 若い年代, and 同じ年代.
This movie is popular with a wide range of age groups.
People from a wide range of age groups took part in this event.
This game can be enjoyed by people of any age group.
The researchers determined the age of the fossil.
I arranged the documents in chronological order.
I went on a trip with a friend who is around the same age.
the '10s; the tens