Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
On what date was Keiichi Ubukata the mediator and Mitsuko Mori the red team host?

### Inputs:
table_name: table, columns: ['Kōhaku #', 'Date', 'Red Team Host', 'White Team Host', 'Mediator', 'Winning Team']

### Response:
SELECT Date FROM table WHERE Mediator = Keiichi Ubukata AND Red Team Host = Mitsuko Mori