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

### Instruction:
How many oricon's have a romaji title of rakuen -memorial tracks- (maxi-single)?

### Inputs:
table_name: table, columns: ['Romaji title', 'Japanese title', 'Release date', 'Reference', 'Oricon']

### Response:
SELECT COUNT Oricon FROM table WHERE Romaji title = rakuen -memorial tracks- (maxi-single)