diff --git a/src/activities/lang/resource/content-ja.json b/src/activities/lang/resource/content-ja.json
new file mode 100644
index 000000000..9e26dfeeb
--- /dev/null
+++ b/src/activities/lang/resource/content-ja.json
@@ -0,0 +1 @@
+{}
\ No newline at end of file