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_89 ( manufacturer VARCHAR, rider VARCHAR, laps VARCHAR, grid VARCHAR )

### Question ###
Which Manufacturer has a Laps of 21, a Grid larger than 16, and a Rider of akira ry ?

### Accurate SQL ###

SELECT manufacturer FROM table_name_89 WHERE laps = 21 AND grid > 16 AND rider = "akira ryō"