What is called the national anthem of Japanese animation?

"Bird Poetry" (Bird Poetry (とりのうた)) is the theme song of the game "AIR" launched by Key in 2000 and the TV animation version produced by Kyoto Animation in 2005. "Bird Poetry" is known as "the national anthem of the Japanese animation industry".

Song title: "Bird Poem" Lyricist: Jun Asae AIR Composer: Shinji Orito Arranger: Kazuya Takase Vocalist: Lia From: Game and TV animation version "AIR" theme song Content: In ancient Japan Kannabi Meimei, a girl with a pair of wings on her back (called a Winged One), was regarded as an ominous symbol and was placed under house arrest. Later, she met Liu Ye who was sent to "protect" her, and went to find her mother (Eight Hundred Bhikshunis) with the female officer Liye. Unfortunately, the mother and daughter were also killed in the end, and Kanna was shot to death by random arrows in the air. But after death, she did not fall, but floated in the air, and was cursed, falling into infinite reincarnation. In order to help Kanna, Riye and Yanagi decided to give birth to offspring to fulfill their wishes for Kanna. 1000 years later it became the legend of the Winged Man. The story begins with a young man named Kunisaki Miuto who knows "magic" and makes a living as a puppet performer. He comes to a seaside town one day and meets the protagonist, Kansuzu Kamio. Kunizaki Yuuto and his ancestors have always been looking for a girl with wings in the sky, and after getting along with Kansuzu, Kansuzu may be the girl he is looking for. Kansuzu is the girl who inherited the Winged One, Murito (and her ancestors) are the descendants of Yanagi and the others, and Kano and Minagi who appear in the original work are characters affected by the feathers that fell from the Winged One. .