I am studying Japanese.

My name is Tanaka.

That is my personal issue.

We are going on a trip together.

I lost my precious belongings.

This restaurant offers an all-you-can-eat service on weekends.

Throwing away food scraps is a waste of food.

He is an expert in ichthyology and has a deep knowledge of marine life.

Cartilaginous fishes do not have bones, instead their bodies are supported by cartilage.

My father is an ichthyologist and has a deep knowledge about marine life.