Table:
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Overall Episode #
Original airdate
Iron Chef
Challenger
Challenger Specialty
Theme Ingredient
Winner
2
1
October 10, 1993
Yutaka Ishinabe
Takeshi Maruyama (丸山　剛)
Chinese ( Cantonese )
Salmon
Yutaka Ishinabe
3
2
October 17, 1993
Rokusaburo Michiba
Yōsei Kobayakawa (小早川陽青)
French
Foie gras
Rokusaburo Michiba
4
3
October 31, 1993
Chen Kenichi
Paolo Indragoli
Italian
Globefish
Chen Kenichi
5
4
November 7, 1993
Yutaka Ishinabe
Toshiyuki Kudō (工藤敏之)
French
Tofu
Yutaka Ishinabe
6
5
November 14, 1993
Rokusaburo Michiba
Zhou Tomiteru ( 周 富輝 Shū Tomiteru ? )
Chinese (Cantonese)
Lobster
Rokusaburo Michiba
7
6
November 21, 1993
Chen Kenichi
Cheng Kazuhiko ( 程　一彦 Tei Kazuhiko ? )
Chinese ( Taiwanese )
Octopus
Cheng Kazuhiko
8
7
November 28, 1993
Yutaka Ishinabe
Masato Mutō (武藤正人)
Japanese
Radish
Yutaka Ishinabe
9
8
December 5, 1993
Rokusaburo Michiba
Zhou Tomitoku ( 周 富徳 Shū Tomitoku ? )
Chinese (Cantonese)
Crab
Rokusaburo Michiba
10
9
December 12, 1993
Yutaka Ishinabe
Eizō Ōyama (大山栄蔵)
Dessert
Banana
Yutaka Ishinabe

Questions and formulas:
Question: How many episodes had Yutaka Ishinabe as the iron chef specializing in french cousin?
Formula: SUM(FILTER(A1, (C1="Yutaka Ishinabe")*(E1="French")))
Formula2: SUM(FILTER(A2:A10, (C2:C10="Yutaka Ishinabe")*(E2:E10="French")))
Level: easy
Question: What episode number originally aired on November 21, 1993?
Formula: SUMIFS(A1,B1,"November 21, 1993")
Formula2: SUMIFS(A2:A10,B2:B10,"November 21, 1993")
Level: easy
Question: Who was the challenger on Episode 5?
Formula: LET(query1,SUMMARIZE(D1,SUMX(A1)),FILTER(query1,CHOOSECOLS(query1,2)=5))
Formula2: LET(query1,SUMMARIZE(D2:D10,SUMX(A2:A10)),FILTER(query1,CHOOSECOLS(query1,2)=5))
Level: hard
Question: How many iron chefs were there when the challenge specialty was Japanese cuisine?
Formula: ROWS(UNIQUE(FILTER(C1, E1="Japanese")))
Formula2: ROWS(UNIQUE(FILTER(C2:C10, E2:E10="Japanese")))
Level: medium