Question: In what number kōhaku was the red team host Peggy Hayama? 
SQL: SELECT "Kōhaku #" FROM "1-1315616-1" WHERE "Red Team Host" = 'Peggy Hayama';

Question: Who was the mediator in kōhaku number 53?
SQL: SELECT "Mediator" FROM "1-1315616-1" WHERE "Kōhaku #" = 53.0;

Question: On what date was Keiichi Ubukata the mediator and Mitsuko Mori the red team host?
SQL: SELECT "Date" FROM "1-1315616-1" WHERE "Mediator" = 'Keiichi Ubukata' AND "Red Team Host" = 'Mitsuko Mori';