This choir is the mass choir of all choirs which are conducted by Ko Matsushita.

Before now, this choir has participated in choral festivals and events, visited schools and welfare facilities, recorded CDs, performed overseas and engaged in exchange activities, thereby contributing to the transmission, preservation, and development of choral culture.

The main activities to date are as follows (excluding independent performances such as the "Koyukai Concert")

2008 Invited to perform in the world premiere of "From Ashes to Light, Nagasaki" by Robert Kier, based on the Nagasaki atomic bombing, in St. Paul, Minnesota.
2011 Performed with the Shenzhen Symphony Orchestra in Shenzhen, China.
2015 Invited to perform at the International Choral Conference organized by ACDA, the American Choral Directors Association, in Salt Lake City, Utah, USA.
2016 Invited to perform at the Pusan International Choir Festival and Competition in South Korea.
2017 Invited to perform at the 50th Anniversary Wakayama Choral Festival.
2018 Performed with the New Japan Philharmonic Orchestra at the 24th Frontier New Year Concert.

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In addition, the choir has been performing the world premiere at the award ceremony of the Japan International Choral Composition Competition, which began in 2015 with the aim of disseminating a new choral music repertoire and further popularizing choral music.

If you would like to sing in this choir, please join one of the various choirs of Koyukai, which are listed on this website.