diff --git a/optuna_dashboard/ts/components/CompareStudies.tsx b/optuna_dashboard/ts/components/CompareStudies.tsx
index a60e037e..692c826d 100644
--- a/optuna_dashboard/ts/components/CompareStudies.tsx
+++ b/optuna_dashboard/ts/components/CompareStudies.tsx
@@ -27,7 +27,7 @@ import { actionCreator } from "../action"
 import { studySummariesState, studyDetailsState } from "../state"
 import { AppDrawer } from "./AppDrawer"
 import { GraphEdfMultiStudies } from "./GraphEdf"
-import { GraphHistoryMultiStudies } from "./GraphHistory"
+import { GraphHistory } from "./GraphHistory"
 import { useNavigate, useLocation } from "react-router-dom"
 
 const useQuery = (): URLSearchParams => {
@@ -313,7 +313,7 @@ const StudiesGraph: FC<{ studies: StudySummary[] }> = ({ studies }) => {
           }}
         >
           <CardContent>
-            <GraphHistoryMultiStudies
+            <GraphHistory
               studies={showStudyDetails}
               includePruned={includePruned}
               logScale={logScale}
diff --git a/optuna_dashboard/ts/components/GraphHistory.tsx b/optuna_dashboard/ts/components/GraphHistory.tsx
index 0410c3b5..3093d82b 100644
--- a/optuna_dashboard/ts/components/GraphHistory.tsx
+++ b/optuna_dashboard/ts/components/GraphHistory.tsx
@@ -1,6 +1,7 @@
 import * as plotly from "plotly.js-dist-min"
 import React, { ChangeEvent, FC, useEffect, useState } from "react"
 import {
+  Box,
   Grid,
   FormControl,
   FormLabel,
@@ -20,6 +21,7 @@ import {
   useFilteredTrialsFromStudies,
   Target,
   useObjectiveAndUserAttrTargets,
+  useObjectiveAndUserAttrTargetsFromStudies,
 } from "../trialFilter"
 
 const plotDomId = "graph-history"
@@ -32,141 +34,6 @@ interface HistoryPlotInfo {
 }
 
 export const GraphHistory: FC<{
-  study: StudyDetail | null
-  logScale: boolean
-  includePruned: boolean
-}> = ({ study, logScale, includePruned }) => {
-  const theme = useTheme()
-  const [xAxis, setXAxis] = useState<
-    "number" | "datetime_start" | "datetime_complete"
-  >("number")
-  const [markerSize, setMarkerSize] = useState<number>(5)
-
-  const [targets, selected, setTarget] = useObjectiveAndUserAttrTargets(study)
-  const trials = useFilteredTrials(study, [selected], !includePruned)
-
-  useEffect(() => {
-    if (study !== null) {
-      plotHistory(
-        trials,
-        study.directions,
-        selected,
-        xAxis,
-        logScale,
-        theme.palette.mode,
-        study?.objective_names,
-        markerSize
-      )
-    }
-  }, [
-    trials,
-    study?.directions,
-    selected,
-    logScale,
-    xAxis,
-    theme.palette.mode,
-    study?.objective_names,
-    markerSize,
-  ])
-
-  const handleObjectiveChange = (event: SelectChangeEvent<string>) => {
-    setTarget(event.target.value)
-  }
-
-  const handleXAxisChange = (e: ChangeEvent<HTMLInputElement>) => {
-    if (e.target.value === "number") {
-      setXAxis("number")
-    } else if (e.target.value === "datetime_start") {
-      setXAxis("datetime_start")
-    } else if (e.target.value === "datetime_complete") {
-      setXAxis("datetime_complete")
-    }
-  }
-
-  return (
-    <Grid container direction="row">
-      <Grid
-        item
-        xs={3}
-        container
-        direction="column"
-        sx={{ paddingRight: theme.spacing(2) }}
-      >
-        <Typography
-          variant="h6"
-          sx={{ margin: "1em 0", fontWeight: theme.typography.fontWeightBold }}
-        >
-          History
-        </Typography>
-        {targets.length >= 2 ? (
-          <FormControl
-            component="fieldset"
-            sx={{ marginBottom: theme.spacing(2) }}
-          >
-            <FormLabel component="legend">y Axis</FormLabel>
-            <Select
-              value={selected.identifier()}
-              onChange={handleObjectiveChange}
-            >
-              {targets.map((t, i) => (
-                <MenuItem value={t.identifier()} key={i}>
-                  {t.toLabel(study?.objective_names)}
-                </MenuItem>
-              ))}
-            </Select>
-          </FormControl>
-        ) : null}
-        <FormControl
-          component="fieldset"
-          sx={{ marginBottom: theme.spacing(2) }}
-        >
-          <FormLabel component="legend">X-axis:</FormLabel>
-          <RadioGroup
-            aria-label="gender"
-            name="gender1"
-            value={xAxis}
-            onChange={handleXAxisChange}
-          >
-            <FormControlLabel
-              value="number"
-              control={<Radio />}
-              label="Number"
-            />
-            <FormControlLabel
-              value="datetime_start"
-              control={<Radio />}
-              label="Datetime start"
-            />
-            <FormControlLabel
-              value="datetime_complete"
-              control={<Radio />}
-              label="Datetime complete"
-            />
-          </RadioGroup>
-        </FormControl>
-        <FormControl>
-          <FormLabel component="legend">Marker size:</FormLabel>
-          <Slider
-            defaultValue={5}
-            marks={true}
-            min={1}
-            max={10}
-            step={1}
-            onChange={(e) => {
-              // @ts-ignore
-              setMarkerSize(e.target.value as number)
-            }}
-          />
-        </FormControl>
-      </Grid>
-      <Grid item xs={9}>
-        <div id={plotDomId} />
-      </Grid>
-    </Grid>
-  )
-}
-
-export const GraphHistoryMultiStudies: FC<{
   studies: StudyDetail[]
   logScale: boolean
   includePruned: boolean
@@ -177,10 +44,8 @@ export const GraphHistoryMultiStudies: FC<{
   >("number")
   const [markerSize, setMarkerSize] = useState<number>(5)
 
-  // TODO(umezawa): Prepare targets with all studies.
-  const [targets, selected, setTarget] = useObjectiveAndUserAttrTargets(
-    studies.length !== 0 ? studies[0] : null
-  )
+  const [targets, selected, setTarget] =
+    useObjectiveAndUserAttrTargetsFromStudies(studies)
 
   const trials = useFilteredTrialsFromStudies(
     studies,
@@ -198,7 +63,7 @@ export const GraphHistoryMultiStudies: FC<{
   })
 
   useEffect(() => {
-    plotHistoryMultiStudies(
+    plotHistory(
       historyPlotInfos,
       selected,
       xAxis,
@@ -206,7 +71,7 @@ export const GraphHistoryMultiStudies: FC<{
       theme.palette.mode,
       markerSize
     )
-  }, [studies, selected, logScale, xAxis, theme.palette.mode])
+  }, [studies, selected, logScale, xAxis, theme.palette.mode, markerSize])
 
   const handleObjectiveChange = (event: SelectChangeEvent<string>) => {
     setTarget(event.target.value)
@@ -299,148 +164,18 @@ export const GraphHistoryMultiStudies: FC<{
         </FormControl>
       </Grid>
       <Grid item xs={9}>
-        <div id={plotDomId} />
+        <Box
+          id={plotDomId}
+          sx={{
+            height: "450px",
+          }}
+        />
       </Grid>
     </Grid>
   )
 }
 
 const plotHistory = (
-  trials: Trial[],
-  directions: StudyDirection[],
-  target: Target,
-  xAxis: "number" | "datetime_start" | "datetime_complete",
-  logScale: boolean,
-  mode: string,
-  objectiveNames?: string[],
-  markerSize: number
-) => {
-  if (document.getElementById(plotDomId) === null) {
-    return
-  }
-
-  const layout: Partial<plotly.Layout> = {
-    margin: {
-      l: 50,
-      t: 0,
-      r: 50,
-      b: 0,
-    },
-    yaxis: {
-      title: target.toLabel(objectiveNames),
-      type: logScale ? "log" : "linear",
-    },
-    xaxis: {
-      title: xAxis === "number" ? "Trial" : "Time",
-      type: xAxis === "number" ? "linear" : "date",
-    },
-    showlegend: true,
-    uirevision: "true",
-    template: mode === "dark" ? plotlyDarkTemplate : {},
-  }
-  if (trials.length === 0) {
-    plotly.react(plotDomId, [], layout)
-    return
-  }
-
-  const feasibleTrials: Trial[] = []
-  const infeasibleTrials: Trial[] = []
-  trials.forEach((t) => {
-    if (t.constraints.every((c) => c <= 0)) {
-      feasibleTrials.push(t)
-    } else {
-      infeasibleTrials.push(t)
-    }
-  })
-
-  const getAxisX = (trial: Trial): number | Date => {
-    return xAxis === "number"
-      ? trial.number
-      : xAxis === "datetime_start"
-      ? trial.datetime_start!
-      : trial.datetime_complete!
-  }
-
-  const plotData: Partial<plotly.PlotData>[] = [
-    {
-      x: feasibleTrials.map(getAxisX),
-      y: feasibleTrials.map(
-        (t: Trial): number => target.getTargetValue(t) as number
-      ),
-      name: target.toLabel(objectiveNames),
-      marker: {
-        size: markerSize,
-      },
-      mode: "markers",
-      type: "scatter",
-    },
-  ]
-
-  const objectiveId = target.getObjectiveId()
-  if (objectiveId !== null) {
-    const xForLinePlot: (number | Date)[] = []
-    const yForLinePlot: number[] = []
-    let currentBest: number | null = null
-    for (let i = 0; i < feasibleTrials.length; i++) {
-      const t = feasibleTrials[i]
-      if (currentBest === null) {
-        currentBest = t.values![objectiveId] as number
-        xForLinePlot.push(getAxisX(t))
-        yForLinePlot.push(t.values![objectiveId] as number)
-      } else if (
-        directions[objectiveId] === "maximize" &&
-        t.values![objectiveId] > currentBest
-      ) {
-        const p = trials[i - 1]
-        if (!xForLinePlot.includes(getAxisX(p))) {
-          xForLinePlot.push(getAxisX(p))
-          yForLinePlot.push(currentBest)
-        }
-        currentBest = t.values![objectiveId] as number
-        xForLinePlot.push(getAxisX(t))
-        yForLinePlot.push(t.values![objectiveId] as number)
-      } else if (
-        directions[objectiveId] === "minimize" &&
-        t.values![objectiveId] < currentBest
-      ) {
-        const p = feasibleTrials[i - 1]
-        if (!xForLinePlot.includes(getAxisX(p))) {
-          xForLinePlot.push(getAxisX(p))
-          yForLinePlot.push(currentBest)
-        }
-        currentBest = t.values![objectiveId] as number
-        xForLinePlot.push(getAxisX(t))
-        yForLinePlot.push(t.values![objectiveId] as number)
-      }
-    }
-    xForLinePlot.push(getAxisX(trials[trials.length - 1]))
-    yForLinePlot.push(yForLinePlot[yForLinePlot.length - 1])
-    plotData.push({
-      x: xForLinePlot,
-      y: yForLinePlot,
-      name: "Best Value",
-      mode: "lines",
-      type: "scatter",
-    })
-  }
-  plotData.push({
-    x: infeasibleTrials.map(getAxisX),
-    y: infeasibleTrials.map(
-      (t: Trial): number => target.getTargetValue(t) as number
-    ),
-    name: "Infeasible Trial",
-    marker: {
-      size: markerSize,
-      color: mode === "dark" ? "#666666" : "#cccccc",
-    },
-    mode: "markers",
-    type: "scatter",
-    showlegend: false,
-  })
-  plotly.react(plotDomId, plotData, layout)
-}
-
-const plotHistoryMultiStudies = (
   historyPlotInfos: HistoryPlotInfo[],
   target: Target,
   xAxis: "number" | "datetime_start" | "datetime_complete",
diff --git a/optuna_dashboard/ts/components/StudyHistory.tsx b/optuna_dashboard/ts/components/StudyHistory.tsx
index c39f3e95..ce30fc44 100644
--- a/optuna_dashboard/ts/components/StudyHistory.tsx
+++ b/optuna_dashboard/ts/components/StudyHistory.tsx
@@ -96,7 +96,7 @@ export const StudyHistory: FC<{ studyId: number }> = ({ studyId }) => {
       >
         <CardContent>
           <GraphHistory
-            study={studyDetail}
+            studies={studyDetail !== null ? [studyDetail] : []}
             includePruned={includePruned}
             logScale={logScale}
           />
diff --git a/optuna_dashboard/ts/trialFilter.ts b/optuna_dashboard/ts/trialFilter.ts
index 96fb308f..4fe7e35a 100644
--- a/optuna_dashboard/ts/trialFilter.ts
+++ b/optuna_dashboard/ts/trialFilter.ts
@@ -192,3 +192,61 @@ export const useObjectiveAndUserAttrTargets = (
   )
   return [targetList, selectedTarget, setTargetIdent]
 }
+
+export const useObjectiveAndUserAttrTargetsFromStudies = (
+  studies: StudyDetail[]
+): [Target[], Target, (ident: string) => void] => {
+  const defaultTarget = new Target("objective", 0)
+  const [selected, setTargetIdent] = useState<string>(
+    defaultTarget.identifier()
+  )
+  const minDirections = useMemo<number>(() => {
+    if (studies.length === 0) {
+      return 0
+    }
+    return studies.reduce((acc, study) => {
+      return Math.min(acc, study.directions.length)
+    }, Number.MAX_VALUE)
+  }, [studies])
+
+  const intersect = (arrays: AttributeSpec[][]) => {
+    const atrEqual = (obj1: AttributeSpec, obj2: AttributeSpec) => {
+      return obj1.key === obj2.key
+    }
+    return arrays.reduce((a, b) =>
+      a.filter((c) => b.some((d) => atrEqual(c, d)))
+    )
+  }
+
+  const attrTargets = useMemo<Target[]>(() => {
+    if (studies.length === 0) {
+      return []
+    }
+    const intersection = intersect(
+      studies.map((study) => study.union_user_attrs)
+    )
+    return intersection
+      .filter((attr) => attr.sortable)
+      .map((attr) => new Target("user_attr", attr.key))
+  }, [studies])
+
+  const targetList = useMemo<Target[]>(() => {
+    if (studies !== null) {
+      return [
+        ...Array.from(
+          { length: minDirections },
+          (_, i) => new Target("objective", i)
+        ),
+        ...attrTargets,
+      ]
+    } else {
+      return [defaultTarget]
+    }
+  }, [minDirections, attrTargets])
+
+  const selectedTarget = useMemo<Target>(
+    () => targetList.find((t) => t.identifier() === selected) || defaultTarget,
+    [targetList, selected]
+  )
+  return [targetList, selectedTarget, setTargetIdent]
+}