booking taxi at 4 AM in Chitose

Hello! I would like to ask just how easy it is to book/hail a cab early in the morning around 4 AM during late December.

For some context, my family of 5 have a flight at 7 AM and are staying relatively near New Chitose Airport. As we have a lot of luggage, and our flight is very early in the morning, public transport just isn't an option.

Is booking a cab easy? What apps can we use?

Thanks in advance! 😊