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_2638104_1 (channel VARCHAR, broadcast_area VARCHAR)
### Question:
How many channels are there in the Greater Tokyo area?
### Answer:
SELECT COUNT(channel) FROM table_2638104_1 WHERE broadcast_area = "Greater Tokyo"