Japan adopted a policy of national isolation during the Edo period.

I had a hard time opening the lock and key for the gate.

I closed and locked the gate.

The adder is a type of venomous snake, and its bite is very dangerous.

He swung the flail around to drive away the enemies.

He cut the tree with a chainsaw.

His incisors are very sharp.

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

There is a large sluice gate in this river.

This organism is classified into the subphylum.