Masato is my best friend.

His success is the result of his personal efforts.

He threw a handful of sand into the sea.

It was a long day today, so I'm going to take a bath and relax.

When I opened the window, a single blast of wind came into the room.

He would do anything for a single meal.

I ended up having to fight a single match with him.

He and I had a single battle in chess.

He is moving forward one step at a time.

My younger sister became a first-year senior high school student this year.