diff --git a/optuna_dashboard/static/components/GraphHistory.tsx b/optuna_dashboard/static/components/GraphHistory.tsx
index ddaf0bf1..5831bc72 100644
--- a/optuna_dashboard/static/components/GraphHistory.tsx
+++ b/optuna_dashboard/static/components/GraphHistory.tsx
@@ -103,7 +103,7 @@ export const GraphHistory: FC<{
             </FormControl>
           ) : null}
           <FormControl component="fieldset" className={classes.formControl}>
-            <FormLabel component="legend">Log scale:</FormLabel>
+            <FormLabel component="legend">Log y scale:</FormLabel>
             <Switch
               checked={logScale}
               onChange={handleLogScaleChange}
diff --git a/optuna_dashboard/static/components/GraphSlice.tsx b/optuna_dashboard/static/components/GraphSlice.tsx
index a23ff237..cb4bd055 100644
--- a/optuna_dashboard/static/components/GraphSlice.tsx
+++ b/optuna_dashboard/static/components/GraphSlice.tsx
@@ -99,7 +99,7 @@ export const GraphSlice: FC<{
             </Select>
           </FormControl>
           <FormControl component="fieldset" className={classes.formControl}>
-            <FormLabel component="legend">Log scale:</FormLabel>
+            <FormLabel component="legend">Log y scale:</FormLabel>
             <Switch
               checked={logYScale}
               onChange={handleLogYScaleChange}