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_81 ( romanization VARCHAR, source_language VARCHAR, rōmaji VARCHAR )

### Question ###
What is the Romanization of the Mandarin word whose R maji is roncha

### Accurate SQL ###

SELECT romanization FROM table_name_81 WHERE source_language = "mandarin" AND rōmaji = "ūroncha"