Other than the above, various types of Soh were invented recently such as nijugen-Soh (20-stringed Soh, actually it was 21-stringed), which was jointly developed by composer Minoru MIKI and Soh musician Keiko NOSAKA in 1969, nijugogen-Soh (25-stringed Soh), sanjugen-Soh (30-stringed Soh) and sanjunigen-Soh (32-stringed Soh).
このほか、現代において作られた箏として1969年に作曲家三木稔と箏曲家野坂恵子が共同開発した二十絃箏（実際は21本の絃がある）、それから二十五絃箏、三十絃、三十二絃箏などがある。