CREATE TABLE "table1_1315616_1" (
  "k_haku_num" real,
  "date" text,
  "red_team_host" text,
  "white_team_host" text,
  "mediator" text,
  "winning_team" text
);

Question: In what number kōhaku was the red team host Peggy Hayama? 
SQL: SELECT "k_haku_num" FROM "table1_1315616_1" WHERE "red_team_host"='Peggy Hayama';

Question: Who was the mediator in kōhaku number 53?
SQL: SELECT "mediator" FROM "table1_1315616_1" WHERE "k_haku_num"=53;

Question: On what date was Keiichi Ubukata the mediator and Mitsuko Mori the red team host?
SQL: SELECT "date" FROM "table1_1315616_1" WHERE "mediator"='Keiichi Ubukata' AND "red_team_host"='Mitsuko Mori';