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 of The Singing Voice of Japan. Notable concerts and performances of the Choir: In 1963, during a discussion in the Budget Committee of the House of Councillors of Japan () around taxes to impose on entry tickets to theaters, Gorō Sudō (), a member of the Japanese Communist Party and militant of The Singing Voice of Japan, asked Kakuei Tanaka (), Minister of Finance at the time, if he knew of the existence of an workers' association of concert goers. To such a question, Minister Tanaka had to answer: "I do not know well about it". So Sudō recommenced his