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_name_4 ( hanja VARCHAR, rr_romaja VARCHAR )

### Question ###
What is the Hanja for the hamgyeong RR Romaja?

### Accurate SQL ###

SELECT hanja FROM table_name_4 WHERE rr_romaja = "hamgyeong"