He thinks that war is a necessary evil.

Genetics is a branch of biology that studies the function of genes and the laws of inheritance.

The doctor said his illness is genetic.

His red hair is thought to be an atavism.

He lost everything.

She is planning a date with her current boyfriend.

My boyfriend gave me a gift.

Everyone was surprised by the news.

We headed to Kyoto on the limited express train.

There are 23 special wards in Tokyo.