Is an Online Arrival Card Required for South Korea?

When entering South Korea, an Arrival Card is required and is usually distributed on the plane in paper format. There is no online pre-registration service available.
The Arrival Card requires you to fill out details such as your name, gender, date of birth, occupation, purpose of stay, and accommodation address.

However, if you have applied for and received approval for K-ETA (Korea Electronic Travel Authorization) in advance, you are exempt from filling out the Arrival Card.