#contents{
  text-align:left;
  padding-left:100px;
}

#introduction{
/*  width:500px;*/
  margin-left:20px;
}

#dv_aboutme{
  margin-top:30px;
/*  width:650px;*/
  background-color:white;
/*  text-align:center;*/
  padding:20px;
}

#comment_en,#comment_jp{
  margin:20px 0;
}