diff a/src/java.base/share/classes/java/lang/Object.java b/src/java.base/share/classes/java/lang/Object.java
--- a/src/java.base/share/classes/java/lang/Object.java
+++ b/src/java.base/share/classes/java/lang/Object.java
@@ -38,15 +38,36 @@
  */
 public class Object {
 
     /**
      * Constructs a new object.
+     * @apiNote {@link Object#newIdentity} should be used instead of {@code new Object()}.
      */
     @HotSpotIntrinsicCandidate
     public Object() {}
 
     /**
+     * Constructs a new Object implementing the IdentityObject interface.
+     * The object is a unique IdentityObject suitable for all purposes
+     * that previously for which {@code new Object{}} was used including synchronization,
+     * mutexes and unique placeholders.
+     *
+     * @return a new Object implementing the IdentityObject interface
+     * @since Valhalla
+     */
+    public static IdentityObject newIdentity() {
+        return new IdentityInstance();
+    }
+
+    /**
+     * IdentityInstance replaces plain {@code new Object()}.
+     */
+    private final static class IdentityInstance implements IdentityObject {
+        private IdentityInstance() {}
+    }
+
+    /**
      * Returns the runtime class of this {@code Object}. The returned
      * {@code Class} object is the object that is locked by {@code
      * static synchronized} methods of the represented class.
      *
      * <p><b>The actual result type is {@code Class<? extends |X|>}