@Blog

    const labels = [];
    const allVisitors = [];
    const generalVisitors = [];
    const staffVisitors = [];

    const rawData = [
      ["4/13", 146426, 22000], ["4/14", 70488, 17000], ["4/15", 63719, 16000], ["4/16", 73869, 15000],
      ["4/17", 82692, 15000], ["4/18", 93908, 15000], ["4/19", 108773, 15000], ["4/20", 95524, 16142],
      ["4/21", 99638, 17352], ["4/22", 103729, 17099], ["4/23", 99140, 17795], ["4/24", 108888, 17376],
      ["4/25", 110759, 17591], ["4/26", 122102, 17299], ["4/27", 102015, 16985], ["4/28", 121282, 17465],
      ["4/29", 97559, 17813], ["4/30", 101397, 17621], ["5/1", 105945, 17548], ["5/2", 104805, 17741],
      ["5/3", 120696, 17886], ["5/4", 136805, 16289], ["5/5", 126371, 16804], ["5/6", 76517, 16935],
      ["5/7", 91688, 16932], ["5/8", 105449, 18578], ["5/9", 105782, 19813], ["5/10", 128918, 21373],
      ["5/11", 121667, 18268], ["5/12", 117658, 17856], ["5/13", 123640, 18087], ["5/14", 129527, 17668],
      ["5/15", 129456, 17762], ["5/16", 132817, 17700], ["5/17", 123974, 16464], ["5/18", 117000, 16000],
      ["5/19", 129000, 17000], ["5/20", 125000, 18000], ["5/21", 129000, 19000], ["5/22", 134000, 18000],
      ["5/23", 157000, 18000]
    ];

    rawData.forEach(([date, total, staff]) => {
      labels.push(date);
      allVisitors.push(total);
      staffVisitors.push(staff);
      generalVisitors.push(total - staff);
    });

    const futureDays = 143;
    for (let i = 1; i <= futureDays; i++) {
      const futureDate = new Date(2025, 4, 13 + i); // 4月13日からスタート
      const label = `${futureDate.getMonth() + 1}/${futureDate.getDate()}`;
      labels.push(label);

      // 予測ロジック: 最近5日間の平均にランダムなゆらぎを加える
      const recentGeneral = generalVisitors.slice(-5);
      const avgGeneral = recentGeneral.reduce((a, b) => a + b, 0) / recentGeneral.length;
      const fluctuation = Math.sin(i / 5) * 5000 + (Math.random() - 0.5) * 8000;
      const predictedGeneral = Math.round(avgGeneral + fluctuation);

      const predictedStaff = 18000 + Math.round(Math.sin(i / 7) * 1000);
      const predictedTotal = predictedGeneral + predictedStaff;

      generalVisitors.push(predictedGeneral);
      staffVisitors.push(predictedStaff);
      allVisitors.push(predictedTotal);
    }

    const ctx = document.getElementById('visitorChart').getContext('2d');
    const chart = new Chart(ctx, {
      type: 'line',
      data: {
        labels: labels,
        datasets: [
          {
            label: '来場者数（合計）',
            data: allVisitors,
            borderColor: 'rgba(75, 192, 192, 1)',
            backgroundColor: 'rgba(75, 192, 192, 0.1)',
            borderWidth: 2,
            tension: 0.3,
            fill: true
          },
          {
            label: '一般来場者数',
            data: generalVisitors,
            borderColor: 'rgba(255, 159, 64, 1)',
            backgroundColor: 'rgba(255, 159, 64, 0.1)',
            borderWidth: 2,
            tension: 0.4,
            fill: true
          },
          {
            label: '関係者数',
            data: staffVisitors,
            borderColor: 'rgba(153, 102, 255, 1)',
            backgroundColor: 'rgba(153, 102, 255, 0.1)',
            borderWidth: 2,
            tension: 0.4,
            fill: true
          }
        ]
      },
      options: {
        animation: {
          duration: 1500,
          easing: 'easeInOutQuart'
        },
        responsive: true,
        scales: {
          y: {
            title: {
              display: true,
              text: '人数'
            }
          },
          x: {
            title: {
              display: true,
              text: '日付'
            },
            ticks: {
              maxRotation: 90,
              minRotation: 45,
              maxTicksLimit: 50
            }
          }
        },
        plugins: {
          legend: {
            position: 'top',
          },
          title: {
            display: false
          }
        }
      }
    });