Table:
text: List of Iron Chef episodes
1993
1993
Overall_Episode_ Original_airdate Iron_Chef Challenger Challenger_Specialty Theme_Ingredient Winner
7 November 28, 1993 Yutaka Ishinabe Masato Mutō (武藤正人) Japanese Radish Yutaka Ishinabe
8 December 5, 1993 Rokusaburo Michiba Zhou Tomitoku ( 周 富徳 Shū Tomitoku ? ) Chinese (Cantonese) Crab Rokusaburo Michiba
9 December 12, 1993 Yutaka Ishinabe Eizō Ōyama (大山栄蔵) Dessert Banana Yutaka Ishinabe

Question: From the list of Iron Chef episodes, how many Iron Chefs were there when the challenge specialty was Japanese cuisine in 1993?