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

He is a famous author and a person who is respected by many people.

I am doing volunteer work to contribute to the community.

His research made a significant contribution to the scientific community.

He has been working as a doctor in this town for many years.

I haven't seen him for a long time.

He has been working as a doctor in this town for many years.

An old person was playing with his grandson in the park.

He is my best friend.

My company is located in Tokyo.