Ex post facto laws pose a problem for a fair legal system.

He surprised people by using magic.

We traveled via the highway.

My dream is to enter a national university.

Japan's national treasury plays a crucial role in supporting economic stability and growth.

His country was under the influence of the suzerain for a long time.

What is his nationality?

He is studying the history of the republic.

He is proud of his national flag.

My homeland is Japan.