diff --git a/optuna_dashboard/ts/components/GraphHyperparameterImportances.tsx b/optuna_dashboard/ts/components/GraphHyperparameterImportances.tsx
index 33f6a4ea..6aadbba1 100644
--- a/optuna_dashboard/ts/components/GraphHyperparameterImportances.tsx
+++ b/optuna_dashboard/ts/components/GraphHyperparameterImportances.tsx
@@ -1,16 +1,13 @@
-import { Box, Card, CardContent, Typography, useTheme } from "@mui/material"
+import { Box, Card, CardContent } from "@mui/material"
 import * as plotly from "plotly.js-dist-min"
 import React, { FC, useEffect } from "react"
 
-import { ParamImportance, StudyDetail } from "ts/types/optuna"
+import { PlotImportance } from "@optuna/react"
+import { StudyDetail } from "ts/types/optuna"
 import { PlotType } from "../apiClient"
 import { useParamImportance } from "../hooks/useParamImportance"
 import { usePlot } from "../hooks/usePlot"
-import {
-  useBackendRender,
-  usePlotlyColorTheme,
-  useStudyDirections,
-} from "../state"
+import { useBackendRender } from "../state"
 
 const plotDomId = "graph-hyperparameter-importances"
 
@@ -19,6 +16,13 @@ export const GraphHyperparameterImportance: FC<{
   study: StudyDetail | null
   graphHeight: string
 }> = ({ studyId, study = null, graphHeight }) => {
+  const numCompletedTrials =
+    study?.trials.filter((t) => t.state === "Complete").length || 0
+  const { importances } = useParamImportance({
+    numCompletedTrials,
+    studyId,
+  })
+
   if (useBackendRender()) {
     return (
       <GraphHyperparameterImportanceBackend
@@ -29,11 +33,15 @@ export const GraphHyperparameterImportance: FC<{
     )
   } else {
     return (
-      <GraphHyperparameterImportanceFrontend
-        studyId={studyId}
-        study={study}
-        graphHeight={graphHeight}
-      />
+      <Card>
+        <CardContent>
+          <PlotImportance
+            study={study}
+            importance={importances}
+            graphHeight={graphHeight}
+          />
+        </CardContent>
+      </Card>
     )
   }
 }
@@ -64,100 +72,3 @@ const GraphHyperparameterImportanceBackend: FC<{
 
   return <Box component="div" id={plotDomId} sx={{ height: graphHeight }} />
 }
-
-const GraphHyperparameterImportanceFrontend: FC<{
-  studyId: number
-  study: StudyDetail | null
-  graphHeight: string
-}> = ({ studyId, study = null, graphHeight }) => {
-  const theme = useTheme()
-  const colorTheme = usePlotlyColorTheme(theme.palette.mode)
-
-  const numCompletedTrials =
-    study?.trials.filter((t) => t.state === "Complete").length || 0
-  const { importances } = useParamImportance({
-    numCompletedTrials,
-    studyId,
-  })
-  const nObjectives = useStudyDirections(studyId)?.length
-  const objectiveNames: string[] =
-    study?.objective_names ||
-    study?.directions.map((d, i) => `Objective ${i}`) ||
-    []
-
-  useEffect(() => {
-    if (importances !== undefined && nObjectives === importances.length) {
-      plotParamImportance(importances, objectiveNames, colorTheme)
-    }
-  }, [nObjectives, importances, colorTheme])
-
-  return (
-    <Card>
-      <CardContent>
-        <Typography
-          variant="h6"
-          sx={{ margin: "1em 0", fontWeight: theme.typography.fontWeightBold }}
-        >
-          Hyperparameter Importance
-        </Typography>
-        <Box component="div" id={plotDomId} sx={{ height: graphHeight }} />
-      </CardContent>
-    </Card>
-  )
-}
-
-const plotParamImportance = (
-  importances: ParamImportance[][],
-  objectiveNames: string[],
-  colorTheme: Partial<Plotly.Template>
-) => {
-  const layout: Partial<plotly.Layout> = {
-    xaxis: {
-      title: "Hyperparameter Importance",
-    },
-    yaxis: {
-      title: "Hyperparameter",
-      automargin: true,
-    },
-    margin: {
-      l: 50,
-      t: 0,
-      r: 50,
-      b: 50,
-    },
-    barmode: "group",
-    bargap: 0.15,
-    bargroupgap: 0.1,
-    uirevision: "true",
-    template: colorTheme,
-    legend: {
-      x: 1.0,
-      y: 0.95,
-    },
-  }
-
-  if (document.getElementById(plotDomId) === null) {
-    return
-  }
-  const traces: Partial<plotly.PlotData>[] = importances.map(
-    (importance, i) => {
-      const reversed = [...importance].reverse()
-      const importance_values = reversed.map((p) => p.importance)
-      const param_names = reversed.map((p) => p.name)
-      const param_hover_templates = reversed.map(
-        (p) => `${p.name} (${p.distribution}): ${p.importance} <extra></extra>`
-      )
-      return {
-        type: "bar",
-        orientation: "h",
-        name: objectiveNames[i],
-        x: importance_values,
-        y: param_names,
-        text: importance_values.map((v) => String(v.toFixed(2))),
-        textposition: "outside",
-        hovertemplate: param_hover_templates,
-      }
-    }
-  )
-  plotly.react(plotDomId, traces, layout)
-}
diff --git a/standalone_app/src/components/StudyDetail.tsx b/standalone_app/src/components/StudyDetail.tsx
index 7d137f5b..e7647a37 100644
--- a/standalone_app/src/components/StudyDetail.tsx
+++ b/standalone_app/src/components/StudyDetail.tsx
@@ -180,9 +180,7 @@ export const StudyDetail: FC<{
             <Grid2 xs={6}>
               <Card sx={{ margin: theme.spacing(2) }}>
                 <CardContent>
-                  {!!study && (
-                    <PlotImportance study={study} importance={importance} />
-                  )}
+                  <PlotImportance study={study} importance={importance} />
                 </CardContent>
               </Card>
             </Grid2>
diff --git a/tslib/react/src/components/PlotImportance.tsx b/tslib/react/src/components/PlotImportance.tsx
index f923e78d..9636c816 100644
--- a/tslib/react/src/components/PlotImportance.tsx
+++ b/tslib/react/src/components/PlotImportance.tsx
@@ -7,19 +7,20 @@ import { plotlyDarkTemplate } from "./PlotlyDarkMode"
 const plotDomId = "graph-hyperparameter-importances"
 
 export const PlotImportance: FC<{
-  study: Optuna.Study
-  importance: Optuna.ParamImportance[][]
-}> = ({ study, importance }) => {
+  study: Optuna.Study | null
+  importance?: Optuna.ParamImportance[][]
+  graphHeight?: string
+}> = ({ study = null, importance, graphHeight = "450px" }) => {
   const theme = useTheme()
-  const objectiveNames: string[] = study.directions.map(
-    (_d, i) => `Objective ${i}`
-  )
+  const objectiveNames: string[] = study
+    ? study.directions.map((_d, i) => `Objective ${i}`)
+    : []
 
   useEffect(() => {
-    if (importance.length > 0) {
+    if (study !== null && importance !== undefined && importance.length > 0) {
       plotParamImportancesBeta(importance, objectiveNames, theme.palette.mode)
     }
-  }, [objectiveNames, importance, theme.palette.mode])
+  }, [study, objectiveNames, importance, theme.palette.mode])
 
   return (
     <>
@@ -29,7 +30,7 @@ export const PlotImportance: FC<{
       >
         Hyperparameter Importance
       </Typography>
-      <Box id={plotDomId} sx={{ height: "450px" }} />
+      <Box id={plotDomId} sx={{ height: graphHeight }} />
     </>
   )
 }