When koki mizuno is the player how man positions are there?
CREATE TABLE table_18254488_2 (position VARCHAR, player VARCHAR)
SELECT COUNT(position) FROM table_18254488_2 WHERE player = "Koki Mizuno"
### Context: CREATE TABLE table_18254488_2 (position VARCHAR, player VARCHAR) ### Question: When koki mizuno is the player how man positions are there? ### Answer: SELECT COUNT(position) FROM table_18254488_2 WHERE player = "Koki Mizuno"