Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: 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?

### Accurate SQL ###

SELECT date FROM table_1315616_1 WHERE mediator = "Keiichi Ubukata" AND red_team_host = "Mitsuko Mori"