The Paleolithic is the first era of human history.

The Mesolithic is the era between the Paleolithic and the Neolithic.

The Bronze Age was an important period in human history.

The Azuchi-Momoyama period was a very important time in Japanese history.

The Azuchi-Momoyama period, also known as the Oda-Nobunaga period, was a very important time in Japanese history.

The Neolithic was an important period in human history.

We should always remember the power of Kannon in difficult times.

His lateness is due to traffic congestion.

In order to solve problems, it is important to listen to the opinions of many people, as the saying goes, 'two heads are better than one'.

He rejoiced when he heard about the success.