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_96 (year INTEGER, venue VARCHAR, event VARCHAR, competition VARCHAR)

### Question ###
How many years had a 100 m hurdles event at the world championships in Osaka, Japan?

### Accurate SQL ###

SELECT SUM(year) FROM table_name_96 WHERE event = "100 m hurdles" AND competition = "world championships" AND venue = "osaka, japan"