<div clsss="graph">
  <canvas id="chart-sample"></canvas>
</div>

const myChart = new Chart(
  document.getElementById( 'chart-sample' ),
  {
    type: 'bar',
    data: {
      labels: [
        '1月',
        '2月',
        '3月',
        '4月',
        '5月',
        '6月'
      ],
      datasets: [
        {
          label: '売上',
          data: [
            120,
            80,
            97,
            105,
            94,
            110
          ],
          backgroundColor: '#E1BEE7'
        }
      ],
    },
    options: {
       plugins: {
         tooltip: {
              enabled: false
        },
         datalabels: {
            font: {
                size: 13
            },
            formatter: function( value, context ) {
                return value.toString() + '万円';
            }
         }
       }
    },
    plugins: [
        ChartDataLabels,
    ],
  }
);