How many previous years did Maebashi Ikuei high school have a total number of 1 participation?
CREATE TABLE "2013_tournament" (
  "prefecture" text,
  "city_town" text,
  "high_school_name" text,
  "year_of_previous_participation" text,
  "total_number_of_participation" real
);
SELECT COUNT("year_of_previous_participation") FROM "2013_tournament" WHERE "total_number_of_participation"=1 AND "high_school_name"='Maebashi Ikuei';