The reasons why the Shiba Inu has airplane ears are as follows:

1. The Shiba Inu will develop airplane ears after realizing its mistake and being scolded by its owner.

2. Shiba Inu will use airplane ears to express when it sees someone it likes, feels comfortable and happy, and runs.

3. When a Shiba Inu is focused on one thing, becomes curious, or walks cautiously, its ears will also appear like airplane ears.

4. When a Shiba Inu is frightened by the people or things around it, it will stare intently at the thing that scares it. At this time, it will appear like airplane ears.