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_73000 ( "Round" real, "Date" text, "Grand Prix" text, "Circuit" text, "Pole Position" text, "Fastest Lap" text, "Race Winner" text )

### Question ###
What grand prixs did Daijiro Hiura win?

### Accurate SQL ###

SELECT "Grand Prix" FROM table_73000 WHERE "Race Winner" = 'Daijiro Hiura'