diff --git a/.gitmodules b/.gitmodules
index 836c4f4..00d1fec 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -138,3 +138,8 @@
 	url = https://cau-gin.brainminds.riken.jp/brainminds/MTI-R01_0090
 	datalad-id = ba6ffa4a-7fee-4916-ac5f-54b76842a3c9
 	datalad-url = https://cau-gin.brainminds.riken.jp/brainminds/MTI-R01_0090
+[submodule "MTI-R01_0091"]
+	path = MTI-R01_0091
+	url = https://cau-gin.brainminds.riken.jp/brainminds/MTI-R01_0091
+	datalad-id = 14ba872e-88a5-4a3c-bd87-1ea2d738bbe9
+	datalad-url = https://cau-gin.brainminds.riken.jp/brainminds/MTI-R01_0091
diff --git a/MTI-R01_0091 b/MTI-R01_0091
new file mode 160000
index 0000000..de93039
--- /dev/null
+++ b/MTI-R01_0091
@@ -0,0 +1 @@
+Subproject commit de93039df1161135d7987e879d1190999914dd47