The Bach Collegium Japan has become perhaps the finest Japanese period-instrument ensemble. Consisting of a chamber orchestra of 20 or so members and a choir of about 25, the ensemble has devoted itself largely to the cantatas and other choral works of J.S. Bach, and to those of various Baroque-era composers, such as Handel, Schütz, and Buxtehude. The group occasionally pares down its forces for instrumental works, such as the Brandenburg Concertos. The Bach Collegium Japan regularly appears in concert at home, as well as at major international locales and has made over 100 re...