Rav Yair Didi was born in Israel in 1977. He completed his studies at the Yeshiva "Chisé Rachamim" of Rav Mazuz and later at the yeshiva "Porat Yosef" by Rav Shalom HaCohen.
He completed his studies as a rabbinic lawyer and rabbi and specialized in kashrut. After completing his studies he began teaching at the Goldeshit yeshiva in Jerusalem.