He was working for free for his friend.

The word 'hatarakikotoba' is used in this old document.

The Supreme Court is the final court for interpreting the laws of the country and protecting the constitution.

He bought stocks at that exchange.

I prefer cash transactions.

We are looking for a new client.

We successfully completed a big transaction.

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

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

Using the private railway makes commuting very convenient.