On what date was Keiichi Ubukata the mediator and Mitsuko Mori the red team host?
CREATE TABLE table_1315616_1 (
    date VARCHAR,
    mediator VARCHAR,
    red_team_host VARCHAR
)
SELECT date FROM table_1315616_1 WHERE mediator = "Keiichi Ubukata" AND red_team_host = "Mitsuko Mori"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: On what date was Keiichi Ubukata the mediator and Mitsuko Mori the red team host? ### Input: CREATE TABLE table_1315616_1 (
    date VARCHAR,
    mediator VARCHAR,
    red_team_host VARCHAR
) ### Response: SELECT date FROM table_1315616_1 WHERE mediator = "Keiichi Ubukata" AND red_team_host = "Mitsuko Mori"