This tree is very hard.

He is a person with a strong heart.

He finished the job in slightly more than an hour.

Tsuyoshi is my best friend.

He is a very strong person.

His strength comes from his mental power.

He was taken to the hospital due to cardiopulmonary arrest.

Please use the emergency stairs in case of a fire.

Due to the earthquake, the city declared a state of emergency.

She is planning a date with her current boyfriend.