There was a large diamond on her ring.

She gave birth to a child as a surrogate mother.

He spoke on my behalf.

Osaka is my friend.

I substituted honey for sugar.

Hiroshi is my best friend.

Yuta is my best friend.

We are looking for a distributor to launch our new product in the market.

Because he was sick, I attended the meeting as his substitute.

I attended the meeting on his behalf.