This bird’s call is said to be one of the three most beautiful birds call in Japan
According
to Wikipedia
Depending
on the definition of the range of species, the distribution area varies
slightly, but roughly inhabits East Asia.
It is also
distributed in the Hawaiian Islands, but it was imported from Japan.
Resident birds are distributed almost all over Japan. However, individuals in cold regions move to warm regions in winter. It has a wide range of environmental adaptability, as it inhabits from flatlands to alpine high pine belts. He prefers bamboo-rich forests and bushes, but may also appear in open areas during the call. The English name "Bush Warbler" means a bird singing in the bush. Be alert and often invisible even if you hear birds call.