I think his Japanese has improved quite a bit, hasn't it?

I am busy with work during the daytime.

My keys are inside the house.

My friend can play the erhu well.

He is good at playing the huqin.

The Steller sea lion is a large marine mammal that lives in the North Pacific.

This ancient document uses the word '胡獱'.

The goblin shark is a legendary creature in Japan, also known as the Ebisu shark.

The room rent is too high, so I'm looking for a new apartment.

I was surprised when I saw his dirty room.