Voice classification in non-classical music chart that follows. The ranges given below are approximations and are not meant to be too rigidly applied. Some men, in falsetto voice or as a result of certain rare physiological conditions, can sing in the same range as women. These do not fall into the female categories, instead called countertenors within classical music. Within contemporary music, however, the use of the term "tenor" for these male voices would be more appropriate. Teaching voice within non-classical music is an emerging field. Up to this point, voice teachers and voice research have been largely concentrated with classical methods of singing. However,
The Singing Voice of Japan The repertoire of the movement consists mainly in revolutionary songs and those of the working class of different nations. Among registered members of individual committees (distinguished by region, industrial union, and other criterion) of the singing voice of Japan is favored to create new songs and choral pieces in the genre suited to the needs of their group. According to the program adopted in 2013, the National Council of the singing voice of Japan aims the objective to include 500 units and choral circles allover the national territory of Japan. Traditionally, the two initial words of the movement's official name