What amount is the junior high school where the gender is male and the specification is minimum diameter of sakigawa?
create table table_13555999_1 (junior_high_school__12_15_yrs_ varchar, gender varchar, specification varchar, PRIMARY KEY (junior_high_school__12_15_yrs_))
select junior_high_school__12_15_yrs_ from table_13555999_1 where gender = "male" and specification = "minimum diameter of sakigawa"