diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e2e4926
--- /dev/null
+++ b/README.md
@@ -0,0 +1,19 @@
+# tosa
+
+## Usage
+
+```
+$ tosa sha
+```
+
+## Install
+
+After install go. Then execute `go get`.
+
+```
+$ go get -u github.com/kyoshidajp/tosa
+```
+
+## Author
+
+Katsuhiko YOSHIDA