diff --git a/android/guava-testlib/pom.xml b/android/guava-testlib/pom.xml
index 9ebeb7da6090..a54de1641d11 100644
--- a/android/guava-testlib/pom.xml
+++ b/android/guava-testlib/pom.xml
@@ -71,6 +71,45 @@
       </plugin>
       <plugin>
         <artifactId>maven-compiler-plugin</artifactId>
+        <executions>
+          <execution>
+            <id>default-compile</id>
+            <configuration>
+              <compilerArgs combine.children="append" combine.self="append">
+                <arg>-XDignore.symbol.file</arg>
+              </compilerArgs>
+            </configuration>
+          </execution>
+          <execution>
+            <id>compile-java9</id>
+            <phase>compile</phase>
+            <goals>
+              <goal>compile</goal>
+            </goals>
+            <configuration>
+              <release>9</release>
+              <compileSourceRoots>
+                <compileSourceRoot>${project.basedir}/src</compileSourceRoot>
+              </compileSourceRoots>
+
+              <!--
+                JPMS needs access to the module sources to complete a modular Java build. We also need to override
+                the base compiler settings (in the root `pom.xml`) to enable MRJAR output.
+              -->
+              <compilerArgs combine.self="override">
+                <arg>-sourcepath</arg>
+                <arg>${project.basedir}/src</arg>
+                <arg>--add-reads=com.google.common=ALL-UNNAMED</arg>
+                <arg>--add-reads=com.google.common.testlib=ALL-UNNAMED</arg>
+                <!-- https://errorprone.info/docs/installation#maven -->
+                <arg>-XDcompilePolicy=simple</arg>
+                <arg>-Xlint:-removal</arg>
+                <arg>-Xlint:-options</arg>
+              </compilerArgs>
+              <multiReleaseOutput>true</multiReleaseOutput>
+            </configuration>
+          </execution>
+        </executions>
       </plugin>
       <plugin>
         <artifactId>maven-source-plugin</artifactId>
diff --git a/android/guava/pom.xml b/android/guava/pom.xml
index 371a648852d6..442352e33dc9 100644
--- a/android/guava/pom.xml
+++ b/android/guava/pom.xml
@@ -62,13 +62,6 @@
       </plugin>
       <plugin>
         <artifactId>maven-jar-plugin</artifactId>
-        <configuration>
-          <archive>
-            <manifestEntries>
-              <Automatic-Module-Name>com.google.common</Automatic-Module-Name>
-            </manifestEntries>
-          </archive>
-        </configuration>
       </plugin>
       <plugin>
         <extensions>true</extensions>
@@ -86,9 +79,12 @@
         </executions>
         <configuration>
           <instructions>
+            <!-- Silence a warning that claims that META-INF/versions/9/... is the "wrong directory" for our classes. -->
+            <_fixupmessages>^Classes found in the wrong directory: .*</_fixupmessages>
             <Export-Package>
               !com.google.common.base.internal,
               !com.google.common.util.concurrent.internal,
+              !META-INF.*,
               com.google.common.*
             </Export-Package>
             <Import-Package>
@@ -103,6 +99,42 @@
       </plugin>
       <plugin>
         <artifactId>maven-compiler-plugin</artifactId>
+        <executions>
+          <execution>
+            <id>default-compile</id>
+            <configuration>
+              <compilerArgs combine.children="append" combine.self="append">
+                <arg>-XDignore.symbol.file</arg>
+              </compilerArgs>
+            </configuration>
+          </execution>
+          <execution>
+            <id>compile-java9</id>
+            <phase>compile</phase>
+            <goals>
+              <goal>compile</goal>
+            </goals>
+            <configuration>
+              <release>9</release>
+              <compileSourceRoots>
+                <compileSourceRoot>${project.basedir}/src</compileSourceRoot>
+              </compileSourceRoots>
+
+              <!--
+                JPMS needs access to the module sources to complete a modular Java build. We also need to override the
+                base compile settings (in the root `pom.xml`) to enable MRJAR output.
+              -->
+              <compilerArgs combine.self="override">
+                <arg>-sourcepath</arg>
+                <arg>${project.basedir}/src</arg>
+                <arg>--add-reads=com.google.common=ALL-UNNAMED</arg>
+                <!-- https://errorprone.info/docs/installation#maven -->
+                <arg>-XDcompilePolicy=simple</arg>
+              </compilerArgs>
+              <multiReleaseOutput>true</multiReleaseOutput>
+            </configuration>
+          </execution>
+        </executions>
       </plugin>
       <plugin>
         <artifactId>maven-source-plugin</artifactId>
diff --git a/android/pom.xml b/android/pom.xml
index bf1c998be9fe..edddece5dbb1 100644
--- a/android/pom.xml
+++ b/android/pom.xml
@@ -145,15 +145,7 @@
             <target>1.8</target>
             <encoding>UTF-8</encoding>
             <parameters>true</parameters>
-            <compilerArgs>
-              <!--
-                   Make includes/excludes fully work:
-                   https://issues.apache.org/jira/browse/MCOMPILER-174
-
-                   (Compare what guava-gwt has to do for maven-javadoc-plugin.)
-              -->
-              <arg>-sourcepath</arg>
-              <arg>doesnotexist</arg>
+            <compilerArgs combine.children="override">
               <!-- https://errorprone.info/docs/installation#maven -->
               <arg>-XDcompilePolicy=simple</arg>
               <arg>--should-stop=ifError=FLOW</arg>
@@ -181,6 +173,7 @@
               <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED</arg>
               <arg>-J--add-opens=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED</arg>
               <arg>-J--add-opens=jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED</arg>
+              <arg>-Xlint:-removal,-options</arg>
             </compilerArgs>
             <annotationProcessorPaths>
               <path>
@@ -192,6 +185,35 @@
             <!-- Fork because we need args like add-exports. (But see the TODO above about .mvn/jvm.config.) -->
             <fork>true</fork>
           </configuration>
+          <executions>
+            <execution>
+              <id>default-compile</id>
+              <configuration>
+                <source>1.8</source>
+                <target>1.8</target>
+                <excludes>
+                  <exclude>module-info.java</exclude>
+                </excludes>
+                <compilerArgs>
+                  <!--
+                      Make includes/excludes fully work:
+                      https://issues.apache.org/jira/browse/MCOMPILER-174
+                      (Compare what guava-gwt has to do for maven-javadoc-plugin.)
+                  -->
+                  <arg>-sourcepath</arg>
+                  <arg>doesnotexist</arg>
+                </compilerArgs>
+              </configuration>
+            </execution>
+            <execution>
+              <id>default-testCompile</id>
+              <configuration>
+                <compilerArgs>
+                  <compilerArg>-Xlint:-removal</compilerArg>
+                </compilerArgs>
+              </configuration>
+            </execution>
+          </executions>
         </plugin>
         <plugin>
           <artifactId>maven-dependency-plugin</artifactId>
@@ -211,7 +233,20 @@
         </plugin>
         <plugin>
           <artifactId>maven-jar-plugin</artifactId>
-          <version>3.2.0</version>
+          <version>3.4.0</version>
+          <configuration>
+            <excludes>
+              <!-- The root module (where applicable) is withheld because it is provided at `META-INF/versions/9/`. -->
+              <exclude>/module-info.class</exclude>
+              <!-- Avoid duplicating compiled classes within the `META-INF/versions/9/` root. -->
+              <exclude>META-INF/versions/9/com/**/*.class</exclude>
+            </excludes>
+            <archive>
+              <manifestEntries>
+                <Multi-Release>true</Multi-Release>
+              </manifestEntries>
+            </archive>
+          </configuration>
         </plugin>
         <plugin>
           <artifactId>maven-javadoc-plugin</artifactId>
diff --git a/guava-gwt/pom.xml b/guava-gwt/pom.xml
index f022d974d637..db9b0fedca72 100644
--- a/guava-gwt/pom.xml
+++ b/guava-gwt/pom.xml
@@ -134,15 +134,20 @@
       </plugin>
       <plugin>
         <artifactId>maven-compiler-plugin</artifactId>
-        <configuration>
-          <excludes>
-            <!-- Yes, we want to exclude ForceGuavaCompilation 4 times: -->
-            <!-- (And we might as well exclude DummyJavadocClass 3 times (though it would be harmless to include).) -->
-            <!-- 1. Don't compile it (since that requires a *non-test* dep on gwt-user. -->
-            <exclude>**/ForceGuavaCompilation*</exclude>
-            <exclude>**/DummyJavadocClass*</exclude>
-          </excludes>
-        </configuration>
+        <executions>
+          <execution>
+            <id>default-compile</id>
+            <configuration>
+              <excludes>
+                <!-- Yes, we want to exclude ForceGuavaCompilation 4 times: -->
+                <!-- (And we might as well exclude DummyJavadocClass 3 times (though it would be harmless to include).) -->
+                <!-- 1. Don't compile it (since that requires a *non-test* dep on gwt-user. -->
+                <exclude>**/ForceGuavaCompilation*</exclude>
+                <exclude>**/DummyJavadocClass*</exclude>
+              </excludes>
+            </configuration>
+          </execution>
+        </executions>
       </plugin>
       <plugin>
         <artifactId>maven-jar-plugin</artifactId>
diff --git a/guava-testlib/pom.xml b/guava-testlib/pom.xml
index 52795e5914ac..8fe4208cc7f9 100644
--- a/guava-testlib/pom.xml
+++ b/guava-testlib/pom.xml
@@ -71,6 +71,45 @@
       </plugin>
       <plugin>
         <artifactId>maven-compiler-plugin</artifactId>
+        <executions>
+          <execution>
+            <id>default-compile</id>
+            <configuration>
+              <compilerArgs combine.children="append" combine.self="append">
+                <arg>-XDignore.symbol.file</arg>
+              </compilerArgs>
+            </configuration>
+          </execution>
+          <execution>
+            <id>compile-java9</id>
+            <phase>compile</phase>
+            <goals>
+              <goal>compile</goal>
+            </goals>
+            <configuration>
+              <release>9</release>
+              <compileSourceRoots>
+                <compileSourceRoot>${project.basedir}/src</compileSourceRoot>
+              </compileSourceRoots>
+
+              <!--
+                JPMS needs access to the module sources to complete a modular Java build. We also need to override
+                the base compiler settings (in the root `pom.xml`) to enable MRJAR output.
+              -->
+              <compilerArgs combine.self="override">
+                <arg>-sourcepath</arg>
+                <arg>${project.basedir}/src</arg>
+                <arg>--add-reads=com.google.common=ALL-UNNAMED</arg>
+                <arg>--add-reads=com.google.common.testlib=ALL-UNNAMED</arg>
+                <!-- https://errorprone.info/docs/installation#maven -->
+                <arg>-XDcompilePolicy=simple</arg>
+                <arg>-Xlint:-removal</arg>
+                <arg>-Xlint:-options</arg>
+              </compilerArgs>
+              <multiReleaseOutput>true</multiReleaseOutput>
+            </configuration>
+          </execution>
+        </executions>
       </plugin>
       <plugin>
         <artifactId>maven-source-plugin</artifactId>
diff --git a/guava-testlib/src/module-info.java b/guava-testlib/src/module-info.java
new file mode 100644
index 000000000000..15668e35e9f3
--- /dev/null
+++ b/guava-testlib/src/module-info.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2024 The Guava Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License
+ * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+ * or implied. See the License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+/** Guava Testlib */
+module com.google.common.testlib {
+  requires java.logging;
+  requires com.google.common;
+  requires com.google.common.util.concurrent.internal;
+
+  exports com.google.common.collect.testing;
+  exports com.google.common.collect.testing.features;
+  exports com.google.common.collect.testing.google;
+  exports com.google.common.collect.testing.testers;
+  exports com.google.common.escape.testing;
+  exports com.google.common.testing;
+  exports com.google.common.util.concurrent.testing;
+}
diff --git a/guava/pom.xml b/guava/pom.xml
index 7249fd404250..9bce9492c291 100644
--- a/guava/pom.xml
+++ b/guava/pom.xml
@@ -62,13 +62,6 @@
       </plugin>
       <plugin>
         <artifactId>maven-jar-plugin</artifactId>
-        <configuration>
-          <archive>
-            <manifestEntries>
-              <Automatic-Module-Name>com.google.common</Automatic-Module-Name>
-            </manifestEntries>
-          </archive>
-        </configuration>
       </plugin>
       <plugin>
         <extensions>true</extensions>
@@ -86,9 +79,12 @@
         </executions>
         <configuration>
           <instructions>
+            <!-- Silence a warning that claims that META-INF/versions/9/... is the "wrong directory" for our classes. -->
+            <_fixupmessages>^Classes found in the wrong directory: .*</_fixupmessages>
             <Export-Package>
               !com.google.common.base.internal,
               !com.google.common.util.concurrent.internal,
+              !META-INF.*,
               com.google.common.*
             </Export-Package>
             <Import-Package>
@@ -103,6 +99,42 @@
       </plugin>
       <plugin>
         <artifactId>maven-compiler-plugin</artifactId>
+        <executions>
+          <execution>
+            <id>default-compile</id>
+            <configuration>
+              <compilerArgs combine.children="append" combine.self="append">
+                <arg>-XDignore.symbol.file</arg>
+              </compilerArgs>
+            </configuration>
+          </execution>
+          <execution>
+            <id>compile-java9</id>
+            <phase>compile</phase>
+            <goals>
+              <goal>compile</goal>
+            </goals>
+            <configuration>
+              <release>9</release>
+              <compileSourceRoots>
+                <compileSourceRoot>${project.basedir}/src</compileSourceRoot>
+              </compileSourceRoots>
+
+              <!--
+                JPMS needs access to the module sources to complete a modular Java build. We also need to override the
+                base compile settings (in the root `pom.xml`) to enable MRJAR output.
+              -->
+              <compilerArgs combine.self="override">
+                <arg>-sourcepath</arg>
+                <arg>${project.basedir}/src</arg>
+                <arg>--add-reads=com.google.common=ALL-UNNAMED</arg>
+                <!-- https://errorprone.info/docs/installation#maven -->
+                <arg>-XDcompilePolicy=simple</arg>
+              </compilerArgs>
+              <multiReleaseOutput>true</multiReleaseOutput>
+            </configuration>
+          </execution>
+        </executions>
       </plugin>
       <plugin>
         <artifactId>maven-source-plugin</artifactId>
diff --git a/guava/src/module-info.java b/guava/src/module-info.java
new file mode 100644
index 000000000000..17bcd9382e62
--- /dev/null
+++ b/guava/src/module-info.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2008 The Guava Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/** Google Guava */
+module com.google.common {
+  requires static jdk.unsupported;
+  requires java.logging;
+  requires com.google.common.util.concurrent.internal;
+
+  exports com.google.common.annotations;
+  exports com.google.common.base;
+  exports com.google.common.cache;
+  exports com.google.common.collect;
+  exports com.google.common.escape;
+  exports com.google.common.eventbus;
+  exports com.google.common.graph;
+  exports com.google.common.hash;
+  exports com.google.common.html;
+  exports com.google.common.io;
+  exports com.google.common.math;
+  exports com.google.common.net;
+  exports com.google.common.primitives;
+  exports com.google.common.reflect;
+  exports com.google.common.util.concurrent;
+  exports com.google.common.xml;
+}
diff --git a/pom.xml b/pom.xml
index 3103cc41b240..cd6739f5a841 100644
--- a/pom.xml
+++ b/pom.xml
@@ -146,15 +146,7 @@
             <target>1.8</target>
             <encoding>UTF-8</encoding>
             <parameters>true</parameters>
-            <compilerArgs>
-              <!--
-                   Make includes/excludes fully work:
-                   https://issues.apache.org/jira/browse/MCOMPILER-174
-
-                   (Compare what guava-gwt has to do for maven-javadoc-plugin.)
-              -->
-              <arg>-sourcepath</arg>
-              <arg>doesnotexist</arg>
+            <compilerArgs combine.children="override">
               <!-- https://errorprone.info/docs/installation#maven -->
               <arg>-XDcompilePolicy=simple</arg>
               <arg>--should-stop=ifError=FLOW</arg>
@@ -182,6 +174,7 @@
               <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED</arg>
               <arg>-J--add-opens=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED</arg>
               <arg>-J--add-opens=jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED</arg>
+              <arg>-Xlint:-removal,-options</arg>
             </compilerArgs>
             <annotationProcessorPaths>
               <path>
@@ -193,6 +186,35 @@
             <!-- Fork because we need args like add-exports. (But see the TODO above about .mvn/jvm.config.) -->
             <fork>true</fork>
           </configuration>
+          <executions>
+            <execution>
+              <id>default-compile</id>
+              <configuration>
+                <source>1.8</source>
+                <target>1.8</target>
+                <excludes>
+                  <exclude>module-info.java</exclude>
+                </excludes>
+                <compilerArgs>
+                  <!--
+                      Make includes/excludes fully work:
+                      https://issues.apache.org/jira/browse/MCOMPILER-174
+                      (Compare what guava-gwt has to do for maven-javadoc-plugin.)
+                  -->
+                  <arg>-sourcepath</arg>
+                  <arg>doesnotexist</arg>
+                </compilerArgs>
+              </configuration>
+            </execution>
+            <execution>
+              <id>default-testCompile</id>
+              <configuration>
+                <compilerArgs>
+                  <compilerArg>-Xlint:-removal</compilerArg>
+                </compilerArgs>
+              </configuration>
+            </execution>
+          </executions>
         </plugin>
         <plugin>
           <artifactId>maven-dependency-plugin</artifactId>
@@ -212,7 +234,20 @@
         </plugin>
         <plugin>
           <artifactId>maven-jar-plugin</artifactId>
-          <version>3.2.0</version>
+          <version>3.4.0</version>
+          <configuration>
+            <excludes>
+              <!-- The root module (where applicable) is withheld because it is provided at `META-INF/versions/9/`. -->
+              <exclude>/module-info.class</exclude>
+              <!-- Avoid duplicating compiled classes within the `META-INF/versions/9/` root. -->
+              <exclude>META-INF/versions/9/com/**/*.class</exclude>
+            </excludes>
+            <archive>
+              <manifestEntries>
+                <Multi-Release>true</Multi-Release>
+              </manifestEntries>
+            </archive>
+          </configuration>
         </plugin>
         <plugin>
           <artifactId>maven-javadoc-plugin</artifactId>