His new book provides a detailed authentic account of his life.

He was reading a true account of the incident.

He thought about the problem from a utilitarian perspective.

He is a pure utilitarian, all his actions are based on the pursuit of profit.

I often fish in the river on weekends.

The children were playing tag in the park.

He really is a music child, isn't he?

He is an expert in probability theory.

Tsugaru is another name for keshi, a plant used to make opium.

Reynoutria multiflora, also known as Japanese knotweed, is a plant often used in traditional oriental medicine.