What is the Japanese name of the Province with a Korean name of Chungcheong-Bukdo?
CREATE TABLE "provinces_under_japanese_colonial_rule" (
  "japanese_name" text,
  "kana" text,
  "hanja_kanji" text,
  "korean_name" text,
  "hangul" text
);
SELECT "japanese_name" FROM "provinces_under_japanese_colonial_rule" WHERE "korean_name"='chungcheong-bukdo';