The correct answer to this open question is the following.
The characteristics of vocal and instrumental music of Japan are the following.
Vocal music in Japan is identified under the term Seigako, an important component of Gagaku music, the oldest form of traditional music in Japan, used basically in the court of the Emperor. Later, Gagako vocal music was permitted in the temples and religious ceremonies in Imperial Japan.
The forms of vocal music in Japan are Koto, Noh, Shamisen, and Shakuhachi.
Instrumental music is known as Kigaku. This is divided into two. Bugaku and Kangen, both styles were influenced by Chinese music.