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

There was a large diamond on her ring.

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

I attended the meeting on his behalf.

She gave birth to a child as a surrogate mother.

He spoke on my behalf.

I substituted honey for sugar.

Hiroshi is my best friend.

Yuta is my best friend.

Yota is my best friend.