His room was filled with a strong smell.

In the old days, samurais always had to be in the vicinity of their lord.

He taught me an important lesson.

He learned a big lesson from that failure.

The procedure for the homestead tax is difficult.

In math class, we learned about finding the area of a circle.

He used the radius to find the area of the circle.

It will take time to find the answer to this difficult question.

The United Kingdom is a constitutional monarchy.

This kanji has a difficult kundoku, making it hard to read.