diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..667695a
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "Keishiki/ext/bgfx"]
+	path = Keishiki/ext/bgfx
+	url = https://github.com/bkaradzic/bgfx.cmake.git
diff --git a/Keishiki/ext/bgfx b/Keishiki/ext/bgfx
new file mode 160000
index 0000000..701d84c
--- /dev/null
+++ b/Keishiki/ext/bgfx
@@ -0,0 +1 @@
+Subproject commit 701d84c2227e9219ad44c760e75c3c6f24a2cff0