This book explains in detail how to use the 'Kyūjitai form of 声門' in old Japanese.

A big support was sent from his friends for his match.

We sent our full support to his match.

His lascivious voice echoed throughout the room.

His chin is very distinctive.

Let's go on a trip together.

He and I deepened our mutual understanding.

Let's go out wearing the matching outfit today.

Last night, hail suddenly started to fall.

He ate one apple.