<aside class="side-menyu">
<div class="oddside-contenerwaku">
  <div class="oddside-contener">
    <div class="akukuri">
      <h2>aタグでpadding指定</h2>
      <div class="oddside-glay">
        Menu
      </div><!-- /.oddside-glay -->
        <ul>
          <li><a href="#">メニュー</a></li>
          <li><a href="#">メニュー</a></li>
          <li><a href="#">メニュー</a></li>
        </ul>
    </div>
   <div class="likukuri">
    <h2>liタグでpadding指定</h2>
     <div class="oddside-glay">
       Menu
     </div><!-- /.oddside-glay -->
       <ul>
         <li><a href="#">メニュー</a></li>
         <li><a href="#">メニュー</a></li>
         <li><a href="#">メニュー</a></li>
       </ul>
      </div>
    </div><!-- /.oddside-contener -->
  </div><!-- /.oddside-contenawaku -->
</aside>
* { 
  box-sizing: border-box;
}
ul {
  padding: 0;
  margin: 0;
}
.oddside-contener {
  width: 800px;
  display: flex;
}
.akukuri ul li a {
  display: block;
  line-height: 3;
  padding: 10px 15px;
  text-decoration: none;
}
.akukuri ul li {
  list-style: none;
  background: #eeeeee;
  border-bottom: 1px solid #666666;
/*   padding: 10px 15px; */
}
.side-menyu ul li a:hover {
  background: #cd30d5;
}
.oddside-glay {
  font-size: 15px;
  line-height: 4.4;
  font-weight: bold;
  padding-left: 5%;
  border-top: 4px solid #0E36CA;
  background: #d0cbcb;
}
.akukuri,
.likukuri {  
  width: 40%;
  margin: 100px 20px;
}

.likukuri ul li a {
  display: block;
  line-height: 3;
/*   padding: 10px 15px; */
  text-decoration: none;
}
.likukuri ul li {
  list-style: none;
  background: #eeeeee;
  border-bottom: 1px solid #666666;
  padding: 10px 15px;
}
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