La Folle Journée, originally from France and came to Tokyo Japan, renew their website to 2015 version and has announced 2015 program(May2-4).

This years artists includes
Bach Collegium Japan (orch)
Ricercar Consort(ensemble)
Sinfonia Varsovia(orch)
Vox Clamantis(chor)

Akane Sakai(pf)
Anne Queffélec(pf)
Boris Berezovsky(pf)
Ekaterina Derzhavina(pf)
Mami Hagiwara(pf)
Yulianna Avdeeva(pf)
Zhu Xiao-Mei(pf)

Augustin Dumay(vn)
Shunske Sato(vn)
Tatsuki Narita(vn)

full list is available here.