Why is Kushiro, Hokkaido, Japan called "the hometown of red-crowned cranes"?

The red-crowned crane is the national bird of Japan, with a pure white body, a black tail and a scarlet crown, and its noble temperament is quite arrogant. The winter from March to April every year is the best season to watch red-crowned cranes. You can see groups of red-crowned cranes spreading their wings and hovering on the snow-white lake. The picture is quite beautiful and romantic. If you want to see the red-crowned crane in Kushiro, there are several places to choose from:

Kushiro City Red-crowned Crane Nature Park: Kushiro City Red-crowned Crane Park covers an area of 96,000 meters, which was specially built by Kushiro City to breed and protect endangered red-crowned cranes. This natural park has successfully cultivated red-crowned cranes artificially in 45 years. At present, there are 18 red-crowned cranes in the nature park, which are quite precious and worth visiting. It is a rare opportunity to not only see the heroic posture of the precious red-crowned crane, but also observe the life of the red-crowned crane at close range. Ahan International Drinking Center: Red-crowned cranes are on the verge of extinction, because they were killed in large numbers in the past. So now it has become a recognized protected bird in Japan. Red-crowned cranes will pass through Ahan Lake in winter, so Ahan Lake has specially set up Ahan International Crane Center, where, in addition to the research of related work, there is also an artificial breeding ground where endangered red-crowned cranes can spend the winter without worry. The International Crane Center also has a library and a screening room, where interested people can visit and learn about the ecology and habits of red-crowned cranes. Or you can go to the farm next to the research room to observe the red-crowned crane up close, and sometimes you can even see the newborn red-crowned crane, which is a rare sight. Visitors who have the opportunity to travel to Lake Ahan or Kushiro must not miss it. Crane sees Taiwan Province: The red-crowned crane was originally the god who loved slaves, but after the gradual development in Hokkaido, the red-crowned crane was hunted and endangered. It was not until Taisho 13 that the Japanese government found the trail of the red-crowned crane again in the wetland, so it ordered a campaign to protect the red-crowned crane, hoping to spread the beauty of the red-crowned crane. At present, there are about 50 red-crowned cranes in Hejiantai. Visitors can watch the life of red-crowned cranes from a distance, and occasionally they can see groups of red-crowned cranes flying together in the air. The scene is quite spectacular. Therefore, Kushiro is called "the hometown of red-crowned cranes" in Japan.