diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
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--- /dev/null
+++ b/.github/CODEOWNERS
@@ -0,0 +1,5 @@
+# About CODEOWNERS: https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
+#
+# These owners will be the default owners for everything in
+# the repo, unless a later match takes precedence.
+* kaoru@soracom.jp