The inner enclosure of this castle was very strong, and it was an important defense line to prevent enemy invasions.

He was observing the inner shell of the clam.

The angle of friction of this material is 30 degrees.

There is no ergative in Japanese.

My apartment is a five-story building.

He was standing on the seashore, staring at the distant horizon.

Japanese is a language with few declensions.

His actions are nothing short of vulgar.

He hit a jackpot at the pachinko.

The number of nuclear-armed countries is increasing worldwide.