Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_1231892_4 ( production_code VARCHAR, us_air_date VARCHAR )

### Question ###
what's the total number of episodes with a US air date of january 15, 2005?

### Accurate SQL ###

SELECT COUNT(production_code) FROM table_1231892_4 WHERE us_air_date = "January 15, 2005"