GeoServerのGeoWebCacheの場合

    var matrixIds = new Array(21);
    for (var i=0; i<21; ++i) {
        matrixIds[i] = "EPSG:900913:" + i;
    }
    var area2_all = new OpenLayers.Layer.WMTS({
        name: "area2_all wmts",
        url: "/geoserver/gwc/service/wmts/",
        layer: "zmaparea2:area2_all",
        matrixSet: "EPSG:900913",
        matrixIds: matrixIds,
        format: "image/png",
        style: null,
        opacity: 0.7,
        isBaseLayer: false
            ,tileSize: new OpenLayers.Size(256,256)
            ,maxExtent: mapBounds
            ,minResolution: maxResolution / ( 1 << (30) )
            ,maxResolution: maxResolution / ( 1 << (0) )
    });
    _map.addLayer(area2_all);

テンプレートで指定する場合
例：日本シームレス地質図

    for (var i=0; i<21; ++i) {
        matrixIds[i] = "" + i;
    }
    var seamless = new OpenLayers.Layer.WMTS({
        name: "日本シームレス地質図",
        url: "https://gbank.gsj.jp/seamless/tilemap/{TileMatrixSet}/{style}/{TileMatrix}/{TileRow}/{TileCol}.png",
        layer: "detailed",
        requestEncoding: "REST",
        version: "1.0.0",
        style: "glfn",
        matrixSet: "detailed",
        matrixIds: matrixIds,
        format: "image/png",
        style: "glfn",
        opacity: 0.7,
        isBaseLayer: false
            ,tileSize: new OpenLayers.Size(256,256)
            ,maxExtent: mapBounds
            ,minResolution: maxResolution / ( 1 << (18) )
            ,maxResolution: maxResolution / ( 1 << (0) )
    });
    _map.addLayer(seamless);
    seamless.setVisibility( false );