My name is Tanaka.

I am studying Japanese.

We are going on a trip together.

Underscores are often used in programming.

I rode on a first-class airplane for the first time.

I booked a business class for the next flight.

I will take a flight in economy class.

He specializes in the study of fish claspers.

Long-haul flights increase the risk of economy class syndrome.

You must be careful of economy class syndrome on long flights.