CREATE TABLE table_18814 ("Specification" TEXT, "Gender" TEXT, "Junior High School  ( 12\\u201315 yrs ) " TEXT, "Senior High School  ( 15\\u201318 yrs ) " TEXT, "University students and Adults  ( 18yrs+ ) " TEXT)

What amount is the junior high school where the gender is male and the specification is minimum diameter of sakigawa?
SELECT "Junior High School (12\u201315 yrs)" FROM table_18814 WHERE "Gender" = 'Male' AND "Specification" = 'Minimum diameter of sakigawa'
SELECT "Junior High School (12\u201315 yrs)" FROM "table_18814" WHERE "Gender" = 'Male' AND "Specification" = 'Minimum diameter of sakigawa'