diff --git a/README.ja.md b/README.ja.md
index ef068eb..b5ea75b 100644
--- a/README.ja.md
+++ b/README.ja.md
@@ -141,6 +141,7 @@ $ git clone https://github.com/nulab/zxcvbn4j.git
 $ cd ./zxcvbn4j
 $ ./gradlew build    # build
 $ ./gradlew test     # test
+$ ./gradlew jmh      # benchmark
 ```
 
 ## 使い方