Rabbi Moshe ben Chasdai Taku (Hebrew: ר' משה בן חסדאי תאקו)(fl. 1250-1290 CE) was a 13th Century Tosafist from Bohemia. Despite his own seemingly mystical orientation, Rabbi Taku is controversially known to have been an opponent of both the esoteric theology of the Chassidei Ashkenaz (particularly the Kalonymides, i.e. followers of Rabbi Yehudah HaChasid) and the philosophical orientation of rabbinic rationalists such as Saadia Gaon, Maimonides, Ibn Ezra et al. He believed that both trends were a deviant departure from traditional Judaism, which he understood to espouse a literal perspective of both the biblical narrative, and the Aggadata of the Sages.