Seiichi Kotani graduated from the University of Tokyo, where he studied conducting with Kazuyoshi Akiyama and Shunsaku Tsutsumi and composition and piano under the late Akio Yashiro and Akira Miyoshi. His made his debut conducting Mozart’s The Magic Flute with the Nikikai Opera Foundation of Shikoku and Western Honshū. Since then, he has embarked on wide range activities, including conducting Die Csárdásfürstin at the Nagata Miho Opera Company, La Bayadère and Scheherazade with the Japan Ballet Society, and My Fair Lady with the Toho Musical Company at the Nissay Theatre.

In addition to his domestic appearances with Japanese orchestras, in October 1997 he conducted the concert version of The Dawn of Japan at Carnegie Hall with the Orpheus Chamber Orchestra, and in October 2003 he conducted Madame Butterfly at the opening festival for South Korea’s first opera house. Between 2005-2006, he continued his conducting studies at the Bologna Opera. In April 2008, he conducted the Masan Philharmonic Orchestra, and in May of the same year he conducted the Solti Festival Orchestra in Budapest. He currently is a visiting professor at Nagoya University of Arts and resident conductor of the Central Aichi Symphony‪.‬