An attempt to automating editing works using OS X Yosemite's JXA (JavaScript for Automation)

KanjifyDate.js

String.prototype.tr = function (from, to) {
    var str = this;
    for (i in [...Array(Math.min(from.length, to.length))]) {
	str = str.replace(new RegExp(from[i], "g"), to[i]);
    }
    return str;
}
 
function kanjify(str) {
    return str.tr("0123456789", "〇一二三四五六七八九");
}
 
function changeDate(str) {
    return str.replace(/(\d{4})(?:\/(\d{1,2})(?:\/(\d{1,2}))?)?/g, function(str, yyyy, mm, dd){
	var tmp = kanjify(yyyy)
        if (mm) tmp += "年" + kanjify(mm) + "月";
	if (dd) tmp += kanjify(dd) + "日";
	return tmp;
    })
}
 
var app = Application("Adobe InDesign CS5"),
    doc = app.activeDocument,
    style = doc.styles;
app.includeStandardAdditions = true;
app.findGrepPreferences.findWhat = '(\\d{4})(?:\/(\\d{1,2})(?:\/(\\d{1,2}))?)?';
app.findGrepPreferences.appliedParagraphStyle = "";
doc.findGrep({reverseOrder: true}).forEach(function(txt){
    var tmp = txt.contents(),
        ans = changeDate(tmp);
    txt.select();
    txt.showText();
    var go  = app.displayDialog(tmp + " を " + ans + "に置換しますか？",
                                {buttons: ["キャンセル","スキップ","OK"],
                                 defaultButton: "OK", cancelButton: "キャンセル"})
                 .buttonReturned == "OK";
    if (go) {
        app.findTextPreferences.findWhat = tmp;
        app.changeTextPreferences.changeTo = ans;
        txt.changeText();
    }
});