The history of the Tokyo Choral Alliance “Koyukai”, major host events and performances are as below.

 
2015 21-23 Aug Hold the “Karuizawa International Choral Festival 2015” (Karuizawa Ohga Hall, Japan) (planned)
Feb Perform in the “2015 ACDA National Conference” (Salt Lake City, USA) (planned)
10 Jan Perform in the “JCDA composer series vol. 5 – Akira Miyoshi” (Yuupouto Hall, Japan) (planned)
2014 11-13 Oct Held the “Karuizawa International Choral Festival 2014” (Karuizawa Ohga Hall, Japan)
2 Feb Held the “Koyukai Concert Vol.7 – Ko Matsushita illustrates the world of Shuntaro Tanikawa” (Dai-ichi seimei Hall, Japan)
2013 Dec Performed in the End-of-the-Year Beethoven’s Ninth Symphony of the Ukraine National Opera Orchestra, 4 performances in the Tokyo Metropolitan Area (Host: Koransha)
10 Nov Hosted a chorus workshop by Mr Pasi Hyökki (Music Hall, Kawaguchi Lilia, Japan)
12-14 Oct Held the “Karuizawa International Choral Festival 2013” (Karuizawa Ohga Hall, Japan)
12 Feb Hosted a chorus workshop by Mr Brady Allred (Academy Bunkyo, Japan)
2012 Dec Performed in the End-of-the-Year Beethoven’s Ninth Symphony of the Ukraine National Opera Orchestra, 4 performances in the Tokyo Metropolitan Area (Host: Koransha)
10-12 Aug Held the “Karuizawa Choral Festival 2012” (Karuizawa Ohga Hall, Japan)
2011 Dec Performed in the End-of-the-Year Beethoven’s Ninth Symphony of the Leningrad State Orchestra, 4 performances in the Tokyo Metropolitan Area (Host: Koransha)
19-21 Aug Held the “Karuizawa Choral Festival 2011” (Karuizawa Ohga Hall, Japan)
2010 Dec Performed in the End-of-the-Year Beethoven’s Ninth Symphony of the Leningrad State Orchestra, 4 performances in the Tokyo Metropolitan Area (Host: Koransha)
3 Nov Held the “Koyukai Concert Vol.6” (Large Hall, Shinjyuku Bunka Center, Japan)
18-20 Aug Held the “Karuizawa Choral Festival 2010” (Karuizawa Ohga Hall, Japan)
2009 Dec Performed in the End-of-the-Year Beethoven’s Ninth Symphony of the Leningrad State Orchestra, 6 performances in the Tokyo Metropolitan Area (Host: Koransha)
7-9 Aug Held the “Karuizawa Choral Festival 2009” (Karuizawa Ohga Hall, Japan)
Mar Held the world premiere of “Missa pro pace” composed by Ko Matsushita with Aichi Gakusen University Orchestra
2008 Dec Performed in the End-of-the-Year Beethoven’s Ninth Symphony of the Leningrad State Orchestra, 5 performances in the Tokyo Metropolitan Area (Host: Koransha)
21 Sep Held the “Koyukai Concert Vol.5 -Ko Matsushita × Kayoko Yamasaki-” (Tokyo Opera City, Japan)
8-10 Aug Held the “Karuizawa Choral Festival 2008” (Karuizawa Ohga Hall, Japan)
2007 17-19 Aug Held the “Karuizawa Choral Festival 2007” (Karuizawa Ohga Hall, Japan)
2006 18-20 Aug Held the “Karuizawa Choral Festival 2006” (Karuizawa Ohga Hall, Japan)
5 Aug Hosted a chorus workshop by Ms Tiia Ester-Loitme
2005 24 Oct Hosted a chorus workshop by Mr Erkki Pohjola
15 Oct Held the “Koyukai Concert Vol.4 -celebration of the Robert Edler Prize awarded to Ko Matsushita-” (Dai-ichi Seimei Hall, Japan)
Commissioned a new piece to Ko Matsushita and made the world premiere. (text: Kayoko Yamasaki)
– Commissioned piece: On a Quiet Rainy Night (for mixed chorus and piano) (text: Shuntaro Tanigawa)
19-21 Aug Held the “Karuizawa Choral Festival 2005” (Karuizawa Ohga Hall, Japan)
(Co-hosted by Tokyo Denka Co. and Gasshou-Hyougen Kenkyukai)
2004 19 Sep Held the “Koyukai Concert Vol.3 -works of Ko Matsushita-” (Large Hall, Sumida Triphony Hall, Japan)
Commisioned a new piece to Ko Matsushita and made the world premiere
– Commissioned piece: The Protectors of Light (for mixed chorus, piano and percussion) (text: Kayoko Yamasaki)
2003
2002 Nov Held the “Koyukai Concert Vol.2 -the world of György Orbán-” (Large Hall, Tiara Koto, Japan)
Commissioned a new piece to a Hungarian composer Mr György Orbán and made the world premiere. Hosted a chorus workshop by Mr György Orbán.
– Commissioned piece: Missa no.11 (For Mixed choir, Orchestra)
2001 Foundation of “Koyukai”, as a group of choirs which Ko Matsushita works as the artistic director and conductor
2000 11 Nov Held the “Koyukai Concert Vol.1” – Joint concert by the 9 choirs that Ko Matsushita works as the artistic director and conductor (Sakura Hall, Hokutopia, Japan)