Irizake is an old Japanese seasoning used during the Edo period, which is made by putting umeboshi (pickled Japanese apricot) into Japanese sake (rice wine), and boiling it down.
煎り酒（いりざけ）とは、江戸時代に用いられていた日本の古い調味料で、日本酒に梅干を入れて煮詰めたもの。