Just as it is improper to intentionally create a situation that requires an additional Beracha, it is similarly improper to intentionally create a situation requiring an additional recitation of Kaddish. For example, on the night of Hoshana Rabba, when it is customary to recite Tehillim, the group should not make unnecessary interruptions so that extra Kaddishim could be recited. Kaddish Yeheh Shelama is recited after the reading of Torah She'bi'chtab (Tanach), but it is improper to unnecessarily interrupt for the purpose of adding extra Kaddishim. Likewise, Kaddish is recited only at the designated points in the prayer service, and after a session learning, but not after other prayers or ceremonies. This is discussed already by the Rambam, in one of his published responsa. Kaddish is customarily recited after a Berit Mila only because we recite a chapter of Tehillim as part of the ceremony. Otherwise, Kaddish should not be recited. Kaddish is not recited after a Huppa, after a Pidyon Ha'ben, or after other ceremonies. If a Torah class was taught immediately before Arbit, and the class was followed by Kaddish Al Yisrael, then the Hazzan should begin Arbit with "Ve'hu Rahum," rather than with Hasi Kaddish, since Kaddish Al Yisrael was just recited. This is the ruling of Hacham David Yosef, in Halacha Berura, and this was the practice followed each day by his father, Hacham Ovadia Yosef. Rav Yisrael Bitan notes that seemingly, it should be acceptable to recite the Hasi Kaddish before Arbit in this case, since both Kaddish recitations are legitimately necessitated – the first because of the Torah class, and the second as the introduction to Arbit. Evidently, Rav Bitan writes, Hacham Ovadia felt that since the congregation begins Arbit immediately after Kaddish Al Yisrael, this Kaddish serves both purposes – concluding the Torah class, and introducing Arbit. Rav Bitan adds that this was the opinion also of Rav Mordechai Sharabi (Yemen-Jerusalem, 1908-1983) and Hacham Bension Abba Shaul (Jerusalem, 1924-1998). It must be emphasized, however, that if an interruption was made following the Kaddish Al Yisrael before Arbit, then the Hasi Kaddish should be recited before Arbit as usual. The Kaddish is omitted only if the congregation begins Arbit immediately after the recitation of Kaddish Al Yisrael. A similar situation arises on Friday night, in synagogues where the Rabbi speaks just before Arbit. Rav Meir Mazuz (1945-2025) writes that in such a case, Kaddish Al Yisrael should not be recited after the Rabbi's address, and the Hazzan should proceed to Hasi-Kaddish and Barechu. If the congregation insists on reciting Kaddish Al Yisrael after the Rabbi's talk. Rav Mazuz adds, then the service should be rearranged such that a different portion of the service requiring Kaddish – such as Lechu Neranena and Shir Hashirim – is recited after the Kaddish Al Yisrael, so the Hazzan can then recite Hasi-Kaddish before Barechu.
