He continued hard labor all day long.

He has contributed to the company for many years as an elderly worker.

There are several words used as 働詞 in this ancient document.

We started a collaboration for a new project.

We decided to collaborate on a new project.

He learned about the concept of synergism in theology class.

Former Imperial Universities are some of the most traditional universities in Japan.

He likes to take a walk in the park at dusk.

Many workers are working in this factory.

Our factory is promoting autonomation.