diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..18bee69
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "External/UnitySensorsROSAssets"]
+	path = External/UnitySensorsROSAssets
+	url = https://github.com/Field-Robotics-Japan/UnitySensorsROSAssets.git
diff --git a/External/UnitySensorsROSAssets b/External/UnitySensorsROSAssets
new file mode 160000
index 0000000..4f76b0e
--- /dev/null
+++ b/External/UnitySensorsROSAssets
@@ -0,0 +1 @@
+Subproject commit 4f76b0ee2d7bf1e1940d23d7cfde55b6d63aef8d