diff --git a/build_bin.sh b/build_bin.sh
index 0c0ea52..a39ba80 100755
--- a/build_bin.sh
+++ b/build_bin.sh
@@ -5,6 +5,7 @@ cargo build --release
 # copy
 mkdir -p $TARGET_DIR
 cp README.md $TARGET_DIR/
+cp README_ja.md $TARGET_DIR/
 cp target/release/sakuramml $TARGET_DIR/
 
 echo "OK"