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_23982399_12 (winner VARCHAR, iron_chef VARCHAR)

### Question ###
Who was the winner when the iron chef is hiroyuki sakai?

### Accurate SQL ###

SELECT winner FROM table_23982399_12 WHERE iron_chef = "Hiroyuki Sakai"