In this chemical reaction, iron reacts with oxygen and oxidizes.

Hello, Mr. Tanaka.

We, three people, went to see a movie.

He drew a triangle on the blackboard.

We are planning to go to Japan in March next year.

His proposal received assent from everyone.

Before starting a new business, he evaluated all the risks as if he were crossing a stone bridge by tapping on it, meaning he was very careful.

He is the type of person who 'breaks the stone bridge by tapping on it', so he is too careful and does not make progress.

He was born as an illegitimate child and experienced many difficulties.

My grandfather used to till his privately-owned rice field.