diff --git a/ui/i18n/datepicker-jp.js b/ui/i18n/datepicker-jp.js
new file mode 100644
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+++ b/ui/i18n/datepicker-jp.js
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+/* Japanese initialisation for the jQuery UI date picker plugin. */
+/* Translated by Nguyen Kha Nam (khanamdev@gmail.com). */
+( function( factory ) {
+	if ( typeof define === "function" && define.amd ) {
+
+		// AMD. Register as an anonymous module.
+		define( [ "../widgets/datepicker" ], factory );
+	} else {
+
+		// Browser globals
+		factory( jQuery.datepicker );
+	}
+}( function( datepicker ) {
+
+datepicker.regional.jp = {
+	closeText: "閉じる",
+	prevText: "<前",
+	nextText: "次>",
+	currentText: "今日",
+	monthNames: [ " 一月", "二月", "三月", "四月", "五月", "六月",
+	"七月", "八月", "九月", "十月", "十一月", "十二月" ],
+	monthNamesShort: [ "1月", "2月", "3月", "4月", "5月", "6月",
+	"7月", "8月", "9月", "10月", "11月", "12月" ],
+	dayNames: [ "日曜日", "月曜", "火曜日", "水曜日", "木曜日", "金曜日", "土曜日", "日曜日" ],
+	dayNamesShort: [ "日", "月", "火", "水", "木", "金", "土", "日" ],
+	dayNamesMin: [ "日", "月", "火", "水", "木", "金", "土", "日" ],
+	weekHeader: "週間",
+	dateFormat: "dd/mm/yy",
+	firstDay: 0,
+	isRTL: false,
+	showMonthAfterYear: false,
+	yearSuffix: "" };
+datepicker.setDefaults( datepicker.regional.jp );
+
+return datepicker.regional.jp;
+
+} ) );