.mainboard { width: 612px; height: auto; float: right; margin-top: 20px; }
.main-contents-board { width: 612px; height: auto; float: right; }
.leftcontentsboard { width: 310px; height: auto; float: left; margin-top: 20px; }
.left-navi-board { width: 310px; height: auto; margin-bottom: 10px; }
.gaka-left-board { width: 145px; height: auto; float: left; }
.gaka-right-board { width: 145px; height: auto; float: right; }
.higashiyama-board { width: 543px; height: auto; margin-right: auto; margin-bottom: 15px; margin-left: auto; }