diff --git a/.gitmodules b/.gitmodules
index 2b29483..556e523 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -3,3 +3,8 @@
 	url = https://cau-gin.brainminds.riken.jp/brainminds/MTI-R01_0026
 	datalad-id = a5572722-42ce-4f9a-81ac-4d70885a79f4
 	datalad-url = https://cau-gin.brainminds.riken.jp/brainminds/MTI-R01_0026
+[submodule "MTI-R01_0028"]
+	path = MTI-R01_0028
+	url = https://cau-gin.brainminds.riken.jp/brainminds/MTI-R01_0028
+	datalad-id = 26fe3b62-7e2d-45c7-8448-46d916e4faf5
+	datalad-url = https://cau-gin.brainminds.riken.jp/brainminds/MTI-R01_0028
diff --git a/MTI-R01_0028 b/MTI-R01_0028
new file mode 160000
index 0000000..35ba20f
--- /dev/null
+++ b/MTI-R01_0028
@@ -0,0 +1 @@
+Subproject commit 35ba20f94c61e477ed3c8ab141168865553dce99