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diff --git a/buildscripts/kokoro/psm-interop-build-java.sh b/buildscripts/kokoro/psm-interop-build-java.sh
new file mode 100755
index 000000000..8c7a970ef
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+++ b/buildscripts/kokoro/psm-interop-build-java.sh
@@ -0,0 +1,90 @@
+#!/usr/bin/env bash
+# Copyright 2024 gRPC 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.
+set -eo pipefail
+
+# This file defines psm::lang::build_docker_images, which is directly called
+# from psm_interop_kokoro_lib.sh.
+
+# Used locally.
+readonly BUILD_APP_PATH="interop-testing/build/install/grpc-interop-testing"
+
+#######################################
+# Builds the test app using gradle and smoke-checks its binaries
+# Globals:
+#   SRC_DIR Absolute path to the source repo.
+#   BUILD_APP_PATH
+# Arguments:
+#   None
+# Outputs:
+#   Writes the output of xds-test-client and xds-test-server --help to stderr
+#######################################
+_build_java_test_app() {
+  psm::tools::log "Building Java test app"
+  cd "${SRC_DIR}"
+
+  set -x
+  GRADLE_OPTS="-Dorg.gradle.jvmargs='-Xmx1g'" \
+  ./gradlew --no-daemon grpc-interop-testing:installDist -x test \
+    -PskipCodegen=true -PskipAndroid=true --console=plain
+  set +x
+
+  psm::tools::log "Test-run grpc-java PSM interop binaries"
+  psm::tools::run_ignore_exit_code "${SRC_DIR}/${BUILD_APP_PATH}/bin/xds-test-client" --help
+  psm::tools::run_ignore_exit_code "${SRC_DIR}/${BUILD_APP_PATH}/bin/xds-test-server" --help
+}
+
+#######################################
+# Builds test app Docker images and pushes them to GCR
+# Globals:
+#   BUILD_APP_PATH
+#   SERVER_IMAGE_NAME: Test server Docker image name
+#   CLIENT_IMAGE_NAME: Test client Docker image name
+#   GIT_COMMIT: SHA-1 of git commit being built
+#   TESTING_VERSION: version branch under test, f.e. v1.42.x, master
+# Arguments:
+#   None
+# Outputs:
+#   Writes the output of `gcloud builds submit` to stdout, stderr
+#######################################
+psm::lang::build_docker_images() {
+  local java_build_log="${BUILD_LOGS_ROOT}/build-lang-java.log"
+  _build_java_test_app |& tee "${java_build_log}"
+
+  psm::tools::log "Building Java xDS interop test app Docker images"
+  local docker_dir="${SRC_DIR}/buildscripts/xds-k8s"
+  local build_dir
+  build_dir="$(mktemp -d)"
+
+  # Copy Docker files, log properties, and the test app to the build dir
+  {
+    cp -v "${docker_dir}/"*.Dockerfile "${build_dir}"
+    cp -v "${docker_dir}/"*.properties "${build_dir}"
+    cp -rv "${SRC_DIR}/${BUILD_APP_PATH}" "${build_dir}"
+  } >> "${java_build_log}"
+
+
+  # cloudbuild.yaml substitution variables
+  local substitutions=""
+  substitutions+="_SERVER_IMAGE_NAME=${SERVER_IMAGE_NAME},"
+  substitutions+="_CLIENT_IMAGE_NAME=${CLIENT_IMAGE_NAME},"
+  substitutions+="COMMIT_SHA=${GIT_COMMIT},"
+  substitutions+="BRANCH_NAME=${TESTING_VERSION},"
+
+  # Run Google Cloud Build
+  gcloud builds submit "${build_dir}" \
+    --config="${docker_dir}/cloudbuild.yaml" \
+    --substitutions="${substitutions}" \
+    | tee -a "${java_build_log}"
+}