Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_1315616_1 (date VARCHAR, mediator VARCHAR, red_team_host VARCHAR)
### Question:
On what date was Keiichi Ubukata the mediator and Mitsuko Mori the red team host?
### Answer:
SELECT date FROM table_1315616_1 WHERE mediator = "Keiichi Ubukata" AND red_team_host = "Mitsuko Mori"