diff --git a/.kokoro/common.cfg b/.kokoro/common.cfg
index ad59b176ade..cdd2deaa833 100644
--- a/.kokoro/common.cfg
+++ b/.kokoro/common.cfg
@@ -16,7 +16,7 @@ build_file: "google-api-nodejs-client/.kokoro/trampoline_v2.sh"
 # Configure the docker image for kokoro-trampoline.
 env_vars: {
     key: "TRAMPOLINE_IMAGE"
-    value: "gcr.io/cloud-devrel-kokoro-resources/node:18-user"
+    value: "gcr.io/cloud-devrel-kokoro-resources/node:22-user"
 }
 env_vars: {
     key: "TRAMPOLINE_BUILD_FILE"
diff --git a/.kokoro/continuous/node18/common.cfg b/.kokoro/continuous/node18/common.cfg
deleted file mode 100644
index ad59b176ade..00000000000
--- a/.kokoro/continuous/node18/common.cfg
+++ /dev/null
@@ -1,24 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Build logs will be here
-action {
-  define_artifacts {
-    regex: "**/*sponge_log.xml"
-  }
-}
-
-# Download trampoline resources.
-gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
-
-# Use the trampoline script to run in docker.
-build_file: "google-api-nodejs-client/.kokoro/trampoline_v2.sh"
-
-# Configure the docker image for kokoro-trampoline.
-env_vars: {
-    key: "TRAMPOLINE_IMAGE"
-    value: "gcr.io/cloud-devrel-kokoro-resources/node:18-user"
-}
-env_vars: {
-    key: "TRAMPOLINE_BUILD_FILE"
-    value: "github/google-api-nodejs-client/.kokoro/test.sh"
-}
diff --git a/.kokoro/continuous/node18/lint.cfg b/.kokoro/continuous/node18/lint.cfg
deleted file mode 100644
index baf4ba48f19..00000000000
--- a/.kokoro/continuous/node18/lint.cfg
+++ /dev/null
@@ -1,4 +0,0 @@
-env_vars: {
-    key: "TRAMPOLINE_BUILD_FILE"
-    value: "github/google-api-nodejs-client/.kokoro/lint.sh"
-}
diff --git a/.kokoro/continuous/node18/samples-test.cfg b/.kokoro/continuous/node18/samples-test.cfg
deleted file mode 100644
index cdae7fe2a0c..00000000000
--- a/.kokoro/continuous/node18/samples-test.cfg
+++ /dev/null
@@ -1,12 +0,0 @@
-# Download resources for system tests (service account key, etc.)
-gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/google-cloud-nodejs"
-
-env_vars: {
-    key: "TRAMPOLINE_BUILD_FILE"
-    value: "github/google-api-nodejs-client/.kokoro/samples-test.sh"
-}
-
-env_vars: {
-  key: "SECRET_MANAGER_KEYS"
-  value: "long-door-651-kokoro-system-test-service-account"
-}
\ No newline at end of file
diff --git a/.kokoro/continuous/node18/system-test.cfg b/.kokoro/continuous/node18/system-test.cfg
deleted file mode 100644
index a7eef3cb5fd..00000000000
--- a/.kokoro/continuous/node18/system-test.cfg
+++ /dev/null
@@ -1,12 +0,0 @@
-# Download resources for system tests (service account key, etc.)
-gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/google-cloud-nodejs"
-
-env_vars: {
-    key: "TRAMPOLINE_BUILD_FILE"
-    value: "github/google-api-nodejs-client/.kokoro/system-test.sh"
-}
-
-env_vars: {
-  key: "SECRET_MANAGER_KEYS"
-  value: "long-door-651-kokoro-system-test-service-account"
-}
\ No newline at end of file
diff --git a/.kokoro/continuous/node18/test.cfg b/.kokoro/continuous/node18/test.cfg
deleted file mode 100644
index e69de29bb2d..00000000000
diff --git a/.kokoro/presubmit/node18/common.cfg b/.kokoro/presubmit/node18/common.cfg
deleted file mode 100644
index ad59b176ade..00000000000
--- a/.kokoro/presubmit/node18/common.cfg
+++ /dev/null
@@ -1,24 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Build logs will be here
-action {
-  define_artifacts {
-    regex: "**/*sponge_log.xml"
-  }
-}
-
-# Download trampoline resources.
-gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/trampoline"
-
-# Use the trampoline script to run in docker.
-build_file: "google-api-nodejs-client/.kokoro/trampoline_v2.sh"
-
-# Configure the docker image for kokoro-trampoline.
-env_vars: {
-    key: "TRAMPOLINE_IMAGE"
-    value: "gcr.io/cloud-devrel-kokoro-resources/node:18-user"
-}
-env_vars: {
-    key: "TRAMPOLINE_BUILD_FILE"
-    value: "github/google-api-nodejs-client/.kokoro/test.sh"
-}
diff --git a/.kokoro/presubmit/node18/samples-test.cfg b/.kokoro/presubmit/node18/samples-test.cfg
deleted file mode 100644
index cdae7fe2a0c..00000000000
--- a/.kokoro/presubmit/node18/samples-test.cfg
+++ /dev/null
@@ -1,12 +0,0 @@
-# Download resources for system tests (service account key, etc.)
-gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/google-cloud-nodejs"
-
-env_vars: {
-    key: "TRAMPOLINE_BUILD_FILE"
-    value: "github/google-api-nodejs-client/.kokoro/samples-test.sh"
-}
-
-env_vars: {
-  key: "SECRET_MANAGER_KEYS"
-  value: "long-door-651-kokoro-system-test-service-account"
-}
\ No newline at end of file
diff --git a/.kokoro/presubmit/node18/system-test.cfg b/.kokoro/presubmit/node18/system-test.cfg
deleted file mode 100644
index a7eef3cb5fd..00000000000
--- a/.kokoro/presubmit/node18/system-test.cfg
+++ /dev/null
@@ -1,12 +0,0 @@
-# Download resources for system tests (service account key, etc.)
-gfile_resources: "/bigstore/cloud-devrel-kokoro-resources/google-cloud-nodejs"
-
-env_vars: {
-    key: "TRAMPOLINE_BUILD_FILE"
-    value: "github/google-api-nodejs-client/.kokoro/system-test.sh"
-}
-
-env_vars: {
-  key: "SECRET_MANAGER_KEYS"
-  value: "long-door-651-kokoro-system-test-service-account"
-}
\ No newline at end of file
diff --git a/.kokoro/presubmit/node18/test.cfg b/.kokoro/presubmit/node18/test.cfg
deleted file mode 100644
index e69de29bb2d..00000000000
diff --git a/.kokoro/release/docs-devsite.cfg b/.kokoro/release/docs-devsite.cfg
index aadc7f0aa9a..700028aa2eb 100644
--- a/.kokoro/release/docs-devsite.cfg
+++ b/.kokoro/release/docs-devsite.cfg
@@ -11,7 +11,7 @@ before_action {
 # doc publications use a Python image.
 env_vars: {
     key: "TRAMPOLINE_IMAGE"
-    value: "gcr.io/cloud-devrel-kokoro-resources/node:18-user"
+    value: "gcr.io/cloud-devrel-kokoro-resources/node:22-user"
 }
 
 # Download trampoline resources.
diff --git a/.kokoro/release/docs.cfg b/.kokoro/release/docs.cfg
index 65c1c199fa2..eeb580cc7f5 100644
--- a/.kokoro/release/docs.cfg
+++ b/.kokoro/release/docs.cfg
@@ -11,7 +11,7 @@ before_action {
 # doc publications use a Python image.
 env_vars: {
     key: "TRAMPOLINE_IMAGE"
-    value: "gcr.io/cloud-devrel-kokoro-resources/node:18-user"
+    value: "gcr.io/cloud-devrel-kokoro-resources/node:22-user"
 }
 
 # Download trampoline resources.
diff --git a/.kokoro/release/docs.sh b/.kokoro/release/docs.sh
index e9079a60530..3692ed27ff1 100755
--- a/.kokoro/release/docs.sh
+++ b/.kokoro/release/docs.sh
@@ -16,7 +16,7 @@
 
 set -eo pipefail
 
-# build jsdocs (Python is installed on the Node 18 docker image).
+# build jsdocs (Python is installed on the Node 22 docker image).
 if [[ -z "$CREDENTIALS" ]]; then
   # if CREDENTIALS are explicitly set, assume we're testing locally
   # and don't set NPM_CONFIG_PREFIX.
diff --git a/.kokoro/test.bat b/.kokoro/test.bat
index caf825656c2..30587e531f7 100644
--- a/.kokoro/test.bat
+++ b/.kokoro/test.bat
@@ -21,7 +21,7 @@ cd ..
 @rem we upgrade Node.js in the image:
 SET PATH=%PATH%;/cygdrive/c/Program Files/nodejs/npm
 
-call nvm use 18
+call nvm use 22
 call which node
 
 call npm install || goto :error
diff --git a/.kokoro/trampoline_v2.sh b/.kokoro/trampoline_v2.sh
index 5d6cfcca528..b69c2849425 100755
--- a/.kokoro/trampoline_v2.sh
+++ b/.kokoro/trampoline_v2.sh
@@ -44,7 +44,7 @@
 # the project root.
 #
 # Here is an example for running this script.
-#   TRAMPOLINE_IMAGE=gcr.io/cloud-devrel-kokoro-resources/node:18-user \
+#   TRAMPOLINE_IMAGE=gcr.io/cloud-devrel-kokoro-resources/node:22-user \
 #     TRAMPOLINE_BUILD_FILE=.kokoro/system-test.sh \
 #     .kokoro/trampoline_v2.sh