diff --git a/c3.js b/c3.js
index 71f1176..dd18365 100644
--- a/c3.js
+++ b/c3.js
@@ -2746,12 +2746,18 @@
         var $$ = this, config = $$.config, h = 30;
         if (axisId === 'x' && !config.axis_x_show) { return 8; }
         if (axisId === 'x' && config.axis_x_height) { return config.axis_x_height; }
-        if (axisId === 'y' && !config.axis_y_show) { return config.legend_show && !$$.isLegendRight && !$$.isLegendInset ? 10 : 1; }
+        if (axisId === 'y' && !config.axis_y_show) { 
+            return config.legend_show && !$$.isLegendRight && !$$.isLegendInset ? 10 : 1; 
+        }
         if (axisId === 'y2' && !config.axis_y2_show) { return $$.rotated_padding_top; }
         // Calculate x axis height when tick rotated
         if (axisId === 'x' && !config.axis_rotated && config.axis_x_tick_rotate) {
             h = 30 + $$.axis.getMaxTickWidth(axisId) * Math.cos(Math.PI * (90 - config.axis_x_tick_rotate) / 180);
         }
+        // Calculate y axis height when tick rotated
+        if (axisId === 'y' && config.axis_rotated && config.axis_y_tick_rotate) {
+            h = 30 + $$.axis.getMaxTickWidth(axisId) * Math.cos(Math.PI * (90 - config.axis_y_tick_rotate) / 180);
+        }
         return h + ($$.axis.getLabelPositionById(axisId).isInner ? 0 : 10) + (axisId === 'y2' ? -10 : 0);
     };
 
@@ -4395,12 +4401,13 @@
         }
         return tickValues;
     };
-    Axis.prototype.getYAxis = function getYAxis(scale, orient, tickFormat, tickValues, withOuterTick, withoutTransition) {
-        var axisParams = {
+    Axis.prototype.getYAxis = function getYAxis(scale, orient, tickFormat, tickValues, withOuterTick, withoutTransition, withoutRotateTickText) {
+        var $$ = this.owner, config = $$.config,
+            axisParams = {
             withOuterTick: withOuterTick,
             withoutTransition: withoutTransition,
+            tickTextRotate: withoutRotateTickText ? 0 : config.axis_y_tick_rotate
         },
-            $$ = this.owner,
             d3 = $$.d3,
             config = $$.config,
             axis = c3_axis(d3, axisParams).scale(scale).orient(orient).tickFormat(tickFormat);
@@ -4595,10 +4602,10 @@
             targetsToShow = $$.filterTargetsToShow($$.data.targets);
             if (id === 'y') {
                 scale = $$.y.copy().domain($$.getYDomain(targetsToShow, 'y'));
-                axis = this.getYAxis(scale, $$.yOrient, config.axis_y_tick_format, $$.yAxisTickValues, false, true);
+                axis = this.getYAxis(scale, $$.yOrient, config.axis_y_tick_format, $$.yAxisTickValues, false, true, true);
             } else if (id === 'y2') {
                 scale = $$.y2.copy().domain($$.getYDomain(targetsToShow, 'y2'));
-                axis = this.getYAxis(scale, $$.y2Orient, config.axis_y2_tick_format, $$.y2AxisTickValues, false, true);
+                axis = this.getYAxis(scale, $$.y2Orient, config.axis_y2_tick_format, $$.y2AxisTickValues, false, true, true);
             } else {
                 scale = $$.x.copy().domain($$.getXDomain(targetsToShow));
                 axis = this.getXAxis(scale, $$.xOrient, $$.xAxisTickFormat, $$.xAxisTickValues, false, true, true);
@@ -6218,6 +6225,10 @@
         if (args.xs) {
             $$.addXs(args.xs);
         }
+        // update names if exists
+        if ('names' in args) {
+            c3_chart_fn.data.names.bind(this)(args.names);
+        }
         // update classes if exists
         if ('classes' in args) {
             Object.keys(args.classes).forEach(function (id) {
diff --git a/src/axis.js b/src/axis.js
index ee83bb3..5268138 100644
--- a/src/axis.js
+++ b/src/axis.js
@@ -76,12 +76,13 @@ Axis.prototype.updateXAxisTickValues = function updateXAxisTickValues(targets, a
     }
     return tickValues;
 };
-Axis.prototype.getYAxis = function getYAxis(scale, orient, tickFormat, tickValues, withOuterTick, withoutTransition) {
-    var axisParams = {
+Axis.prototype.getYAxis = function getYAxis(scale, orient, tickFormat, tickValues, withOuterTick, withoutTransition, withoutRotateTickText) {
+    var $$ = this.owner, config = $$.config,
+        axisParams = {
         withOuterTick: withOuterTick,
         withoutTransition: withoutTransition,
+        tickTextRotate: withoutRotateTickText ? 0 : config.axis_y_tick_rotate
     },
-        $$ = this.owner,
         d3 = $$.d3,
         config = $$.config,
         axis = c3_axis(d3, axisParams).scale(scale).orient(orient).tickFormat(tickFormat);
@@ -276,10 +277,10 @@ Axis.prototype.getMaxTickWidth = function getMaxTickWidth(id, withoutRecompute)
         targetsToShow = $$.filterTargetsToShow($$.data.targets);
         if (id === 'y') {
             scale = $$.y.copy().domain($$.getYDomain(targetsToShow, 'y'));
-            axis = this.getYAxis(scale, $$.yOrient, config.axis_y_tick_format, $$.yAxisTickValues, false, true);
+            axis = this.getYAxis(scale, $$.yOrient, config.axis_y_tick_format, $$.yAxisTickValues, false, true, true);
         } else if (id === 'y2') {
             scale = $$.y2.copy().domain($$.getYDomain(targetsToShow, 'y2'));
-            axis = this.getYAxis(scale, $$.y2Orient, config.axis_y2_tick_format, $$.y2AxisTickValues, false, true);
+            axis = this.getYAxis(scale, $$.y2Orient, config.axis_y2_tick_format, $$.y2AxisTickValues, false, true, true);
         } else {
             scale = $$.x.copy().domain($$.getXDomain(targetsToShow));
             axis = this.getXAxis(scale, $$.xOrient, $$.xAxisTickFormat, $$.xAxisTickValues, false, true, true);
diff --git a/src/size.js b/src/size.js
index fb05a79..abc8265 100644
--- a/src/size.js
+++ b/src/size.js
@@ -95,12 +95,18 @@ c3_chart_internal_fn.getHorizontalAxisHeight = function (axisId) {
     var $$ = this, config = $$.config, h = 30;
     if (axisId === 'x' && !config.axis_x_show) { return 8; }
     if (axisId === 'x' && config.axis_x_height) { return config.axis_x_height; }
-    if (axisId === 'y' && !config.axis_y_show) { return config.legend_show && !$$.isLegendRight && !$$.isLegendInset ? 10 : 1; }
+    if (axisId === 'y' && !config.axis_y_show) { 
+        return config.legend_show && !$$.isLegendRight && !$$.isLegendInset ? 10 : 1; 
+    }
     if (axisId === 'y2' && !config.axis_y2_show) { return $$.rotated_padding_top; }
     // Calculate x axis height when tick rotated
     if (axisId === 'x' && !config.axis_rotated && config.axis_x_tick_rotate) {
         h = 30 + $$.axis.getMaxTickWidth(axisId) * Math.cos(Math.PI * (90 - config.axis_x_tick_rotate) / 180);
     }
+    // Calculate y axis height when tick rotated
+    if (axisId === 'y' && config.axis_rotated && config.axis_y_tick_rotate) {
+        h = 30 + $$.axis.getMaxTickWidth(axisId) * Math.cos(Math.PI * (90 - config.axis_y_tick_rotate) / 180);
+    }
     return h + ($$.axis.getLabelPositionById(axisId).isInner ? 0 : 10) + (axisId === 'y2' ? -10 : 0);
 };