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_2144389_9 (japanese_title VARCHAR, vocalist VARCHAR)
### Question:
When momoiro clover z is the vocalist how many japanese titles are there?
### Answer:
SELECT COUNT(japanese_title) FROM table_2144389_9 WHERE vocalist = "Momoiro Clover Z"