This chaff is the part that remains after the rice harvest.

I will turn thirty this year.

I turned thirty years old.

He can speak thirty languages.

He is good at solving math problems, I really think he has good brains.

He looked at his side and seemed to remember something.

He is good at making yaramiso.

Today is the last day of the month, do you have any special plans?

There is a friend's wedding on the thirtieth of this month.

I am studying Japanese.