Skytrax's list for the World's Cleanest Airports is out, with Tokyo's Haneda International taking home the coveted award once again. This is Haneda's ninth consecutive time winning World's Cleanest Airport, showing its consistent cleanliness and sanitation.

Asia excelled as a whole, with 9 of the top 10 airports in this category being located on the continent-- four in Japan, one in Qatar, one in China, one in South Korea, one in Singapore, and one in Taiwan. The only airport outside Asia that ranked in the top 10 was Zurich, which came 10th.

Here are the top 10 cleanest airports in the world:

1. Tokyo Haneda Intl.

2. Seoul Incheon Intl.

3. Singapore Changi Intl.

4. Doha Hamad Intl.

5. Centrair Nagoya Intl.

6. Tokyo Narita Intl.

7. Kansai Intl.

8. Hong Kong Intl.

9. Taiwan Taoyuan Intl.

10. Zurich Intl.

Cover image credit to Skytrax