diff --git a/ch06/hyperparameter_optimization.py b/ch06/hyperparameter_optimization.py
index 65e0d424b..c9e3d0730 100644
--- a/ch06/hyperparameter_optimization.py
+++ b/ch06/hyperparameter_optimization.py
@@ -40,7 +40,7 @@ def __train(lr, weight_decay, epocs=50):
 results_val = {}
 results_train = {}
 for _ in range(optimization_trial):
-    # 探索したハイパーパラメータの範囲を指定===============
+    # 探索したいハイパーパラメータの範囲を指定===============
     weight_decay = 10 ** np.random.uniform(-8, -4)
     lr = 10 ** np.random.uniform(-6, -2)
     # ================================================