Edit in JSFiddle

$('#datetimepicker').datetimepicker({
        format: 'yyyy年 dd月 MM日 hh:mm',
        language: 'ja',
        pickDate: true,
        pickTime: true,
        hourStep: 1,
        minuteStep: 15,
        secondStep: 30,
        inputMask: true
      });

  <div id="datetimepicker" class="input-append date">
      <input type="text"></input>
      <span class="add-on">
        <i data-time-icon="icon-time" data-date-icon="icon-calendar"></i>
      </span>
    </div>