In what number kōhaku was the red team host Peggy Hayama? 
CREATE TABLE "table1_1315616_1" (
  "k_haku_num" real,
  "date" text,
  "red_team_host" text,
  "white_team_host" text,
  "mediator" text,
  "winning_team" text
);
SELECT "k_haku_num" FROM "table1_1315616_1" WHERE "red_team_host"='Peggy Hayama';