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

### Instruction:
Name the number of vocalists for  which one ~ is it?

### Inputs:
table_name: table, columns: ['#', 'Japanese title', 'Rōmaji', 'Japanese translation', 'Vocalist', 'Episodes used']

### Response:
SELECT COUNT Vocalist FROM table WHERE Japanese translation = Which One ~ Is It?