diff --git a/CHANGELOG.adoc b/CHANGELOG.adoc
index db32eba6f0..6e572cc616 100644
--- a/CHANGELOG.adoc
+++ b/CHANGELOG.adoc
@@ -82,6 +82,7 @@ It is also now possible to create new concerns using the _New Concern_ tool from
 A requirement derivation is a `ConnectionUsage` annotated with the `#derivation` metadata or typed by `DerivationConnections::Derivation`.
 The edge goes from the derived requirement to the original one and is displayed as a dashed `«derive»` line, so it can be distinguished from a `«satisfy»` edge.
 - https://github.com/eclipse-syson/syson/issues/2403[#2403] [diagrams] Add support for the inheritance of `ItemUsage` border nodes on `ActionDefinition` and `ActionUsage` graphical nodes.
+- https://github.com/eclipse-syson/syson/issues/2404[#2404] [diagrams] Add support for the inheritance of `ItemUsage` border nodes on `PortDefinition` and `PortUsage` graphical nodes.
 
 == v2026.7.0
 
diff --git a/backend/application/syson-application/src/test/java/org/eclipse/syson/application/controllers/diagrams/general/view/inheritance/GVCompartmentItemInheritanceTests.java b/backend/application/syson-application/src/test/java/org/eclipse/syson/application/controllers/diagrams/general/view/inheritance/GVCompartmentItemInheritanceTests.java
index d1ed0c51dc..4f62af67a6 100644
--- a/backend/application/syson-application/src/test/java/org/eclipse/syson/application/controllers/diagrams/general/view/inheritance/GVCompartmentItemInheritanceTests.java
+++ b/backend/application/syson-application/src/test/java/org/eclipse/syson/application/controllers/diagrams/general/view/inheritance/GVCompartmentItemInheritanceTests.java
@@ -193,9 +193,9 @@ private static Stream<Arguments> itemsCompartmentItemInheritanceArguments() {
                 Arguments.of(ACTION_USAGE_ARGUMENT, nestedItemWithBorderNode, ACTION_USAGE_ARGUMENT, SUBSETTING_ARGUMENT.withExtraBorderNodes(1)),
                 Arguments.of(ACTION_USAGE_ARGUMENT, nestedItemWithBorderNode, ACTION_USAGE_ARGUMENT, REFERENCE_SUBSETTING_ARGUMENT.withExtraBorderNodes(1)),
                 Arguments.of(ACTION_USAGE_ARGUMENT, nestedItemWithBorderNode, ACTION_USAGE_ARGUMENT, REDEFINITION_ARGUMENT.withExtraBorderNodes(1)),
-                Arguments.of(PORT_USAGE_ARGUMENT, nestedItemWithBorderNode, PORT_USAGE_ARGUMENT, SUBSETTING_ARGUMENT),
-                Arguments.of(PORT_USAGE_ARGUMENT, nestedItemWithBorderNode, PORT_USAGE_ARGUMENT, REFERENCE_SUBSETTING_ARGUMENT),
-                Arguments.of(PORT_DEFINITION_ARGUMENT, nestedItemWithBorderNode, PORT_DEFINITION_ARGUMENT, SUBCLASSIFICATION_ARGUMENT)
+                Arguments.of(PORT_USAGE_ARGUMENT, nestedItemWithBorderNode, PORT_USAGE_ARGUMENT, SUBSETTING_ARGUMENT.withExtraBorderNodes(1)),
+                Arguments.of(PORT_USAGE_ARGUMENT, nestedItemWithBorderNode, PORT_USAGE_ARGUMENT, REFERENCE_SUBSETTING_ARGUMENT.withExtraBorderNodes(1)),
+                Arguments.of(PORT_DEFINITION_ARGUMENT, nestedItemWithBorderNode, PORT_DEFINITION_ARGUMENT, SUBCLASSIFICATION_ARGUMENT.withExtraBorderNodes(1))
         );
     }
 
diff --git a/backend/views/syson-standard-diagrams-view/src/main/java/org/eclipse/syson/standard/diagrams/view/nodes/DefinitionNodeDescriptionProvider.java b/backend/views/syson-standard-diagrams-view/src/main/java/org/eclipse/syson/standard/diagrams/view/nodes/DefinitionNodeDescriptionProvider.java
index 799af72e2c..34141c44a3 100644
--- a/backend/views/syson-standard-diagrams-view/src/main/java/org/eclipse/syson/standard/diagrams/view/nodes/DefinitionNodeDescriptionProvider.java
+++ b/backend/views/syson-standard-diagrams-view/src/main/java/org/eclipse/syson/standard/diagrams/view/nodes/DefinitionNodeDescriptionProvider.java
@@ -84,6 +84,7 @@ protected Set<NodeDescription> getReusedBorderNodes(IViewDiagramElementFinder ca
             cache.getNodeDescription(this.getDescriptionNameGenerator().getInheritedBorderNodeName(SysmlPackage.eINSTANCE.getReferenceUsage())).ifPresent(borderNodes::add);
         } else if (SysmlPackage.eINSTANCE.getPortDefinition().equals(this.eClass)) {
             cache.getNodeDescription(this.getDescriptionNameGenerator().getBorderNodeName(SysmlPackage.eINSTANCE.getItemUsage(), SysmlPackage.eINSTANCE.getDefinition_OwnedItem())).ifPresent(borderNodes::add);
+            cache.getNodeDescription(this.getDescriptionNameGenerator().getInheritedBorderNodeName(SysmlPackage.eINSTANCE.getItemUsage(), SysmlPackage.eINSTANCE.getDefinition_OwnedItem())).ifPresent(borderNodes::add);
         }
         return borderNodes;
     }
diff --git a/backend/views/syson-standard-diagrams-view/src/main/java/org/eclipse/syson/standard/diagrams/view/nodes/UsageNodeDescriptionProvider.java b/backend/views/syson-standard-diagrams-view/src/main/java/org/eclipse/syson/standard/diagrams/view/nodes/UsageNodeDescriptionProvider.java
index edafcb388e..bc91ce042c 100644
--- a/backend/views/syson-standard-diagrams-view/src/main/java/org/eclipse/syson/standard/diagrams/view/nodes/UsageNodeDescriptionProvider.java
+++ b/backend/views/syson-standard-diagrams-view/src/main/java/org/eclipse/syson/standard/diagrams/view/nodes/UsageNodeDescriptionProvider.java
@@ -121,6 +121,7 @@ protected Set<NodeDescription> getReusedBorderNodes(IViewDiagramElementFinder ca
             cache.getNodeDescription(this.getDescriptionNameGenerator().getInheritedBorderNodeName(SysmlPackage.eINSTANCE.getReferenceUsage())).ifPresent(borderNodes::add);
         } else if (SysmlPackage.eINSTANCE.getPortUsage().equals(this.eClass)) {
             cache.getNodeDescription(this.getDescriptionNameGenerator().getBorderNodeName(SysmlPackage.eINSTANCE.getItemUsage(), SysmlPackage.eINSTANCE.getUsage_NestedItem())).ifPresent(borderNodes::add);
+            cache.getNodeDescription(this.getDescriptionNameGenerator().getInheritedBorderNodeName(SysmlPackage.eINSTANCE.getItemUsage(), SysmlPackage.eINSTANCE.getUsage_NestedItem())).ifPresent(borderNodes::add);
         }
         return borderNodes;
     }
diff --git a/doc/content/modules/user-manual/assets/images/release-notes-port-inherited-item-border-nodes.png b/doc/content/modules/user-manual/assets/images/release-notes-port-inherited-item-border-nodes.png
new file mode 100644
index 0000000000..ae8f07a411
Binary files /dev/null and b/doc/content/modules/user-manual/assets/images/release-notes-port-inherited-item-border-nodes.png differ
diff --git a/doc/content/modules/user-manual/pages/release-notes/2026.9.0.adoc b/doc/content/modules/user-manual/pages/release-notes/2026.9.0.adoc
index 818205c889..8d7d4b3bac 100644
--- a/doc/content/modules/user-manual/pages/release-notes/2026.9.0.adoc
+++ b/doc/content/modules/user-manual/pages/release-notes/2026.9.0.adoc
@@ -76,6 +76,9 @@ The direction of the edge is given by the `#original` and `#derive` metadata of
 ** Add support for the inheritance of `ItemUsage` border nodes on `ActionDefinition` and `ActionUsage` graphical nodes.
 +
 image::release-notes-action-inherited-item-border-nodes.png[ItemUsage border node inheritance on ActionDefinition and ActionUsage]
+** Add support for the inheritance of `ItemUsage` border nodes on `PortDefinition` and `PortUsage` graphical nodes.
++
+image::release-notes-port-inherited-item-border-nodes.png[ItemUsage border node inheritance on PortDefinition and PortUsage]
 
 == Bug fixes