img.talker_icon {
    margin-top: -15px;
    margin-right: -10px;
    margin-bottom: 10px;
}
img.talker_icon {
    width: 40%;
}

#yodogawa div {
	text-align: center;
	
} 

@media screen and (max-width: 640px){
	
  img.talker_icon {
    width: 20%;
    max-width: 80px;
  }
}