Add Japanese translation

select2_locale_ja.js

@@ -0,0 +1,15 @@
+/**
+ * Select2 Japanese translation.
+ */
+(function ($) {
+    "use strict";
+
+    $.extend($.fn.select2.defaults, {
+        formatNoMatches: function () { return "該当項目なし"; },
+        formatInputTooShort: function (input, min) { var n = min - input.length; return "後" + n + "文字入れてください"; },
+        formatInputTooLong: function (input, max) { var n = input.length - max; return "検索文字列が" + n + "文字長すぎます"; },
+        formatSelectionTooBig: function (limit) { return "最多で" + limit + "項目までしか選択できません"; },
+        formatLoadMore: function (pageNumber) { return "読込中･･･"; },
+        formatSearching: function () { return "検索中･･･"; }
+    });
+})(jQuery);