地方名を表示させる際にVLOOKUP関数で行うのでしたら、
=VLOOKUP(A1,E1:F6,2,TRUE)
の様に末尾が「TRUE)」としたのでは駄目です。
=VLOOKUP(A1,E1:F47,2,FALSE)
として下さい。
因みに、次の様な関数を使えば、リストを作成しなくとも地方名を表示させる事が出来ます。
=IF(ISNUMBER(MATCH(A1,{"北海道","青森県","岩手県","宮城県","秋田県","山形県","福島県","茨城県","栃木県","群馬県","埼玉県","千葉県","東京都","神奈川県","新潟県","富山県","石川県","福井県","山梨県","長野県","岐阜県","静岡県","愛知県","三重県","滋賀県","京都府","大阪府","兵庫県","奈良県","和歌山県","鳥取県","島根県","岡山県","広島県","山口県","徳島県","香川県","愛媛県","高知県","福岡県","佐賀県","長崎県","熊本県","大分県","宮崎県","鹿児島県","沖縄県"},0)),LOOKUP(MATCH(A1,{"北海道","青森県","岩手県","宮城県","秋田県","山形県","福島県","茨城県","栃木県","群馬県","埼玉県","千葉県","東京都","神奈川県","新潟県","富山県","石川県","福井県","山梨県","長野県","岐阜県","静岡県","愛知県","三重県","滋賀県","京都府","大阪府","兵庫県","奈良県","和歌山県","鳥取県","島根県","岡山県","広島県","山口県","徳島県","香川県","愛媛県","高知県","福岡県","佐賀県","長崎県","熊本県","大分県","宮崎県","鹿児島県","沖縄県"},0),{1,2,8,15,24,31,36,40,47;"北海道","東北","関東","中部","近畿","中国","四国","九州","沖縄"}),"")