He always proactively suggests new ideas.

The Edo oil shark is a type of shark that lives in the deep sea.

The Cultural Revolution is a part of China's history.

By regularly checking the key performance indicators, you can understand the performance of the company and devise improvement measures.

The Paleolithic is the first era of human history.

The Bronze Age was an important period in human history.

The Neolithic was an important period in human history.

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

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

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