Career
Blazer became the chief rabbi of Saint St. Petersburg in 1861-1862, when he was only 25 years old. From 1880 to approximately 1891, he served as the head of the Kovno Kollel in Kaunas, Lithuania, which was founded by Salanter. He later joined Nosson Tzvi Finkel in leading the Slabodka Yeshiva, and eventually moved to Palestine where he died in 1907.
He was the author of Peri Yitzchak", a halakhic text, as well as articles on Musar, Teshuvah, and the life of his teacher Yisrael Salanter.
Rabbi Yosef Yozel Horwitz was a distinguished (muvhak) pupil of Rabbi Blazer.
