Housing
Kotan houses were made of cogon grasses, bamboo grass, barks, etc. The length lay east to west or parallel to a river. A house was about seven meters by five with an entrance at the west end that also served as a storeroom. The house had three windows, including the "rorun-puyar," a window located on the side facing the entrance (at the east side) , through which gods entered and left and ceremonial tools were taken in and out. The Ainu have regarded this window as sacred and have been told never to look in through it. A house had a fireplace near the entrance. The husband and wife sat on the fireplace's left side (called "shiso") . Children and guests sat facing them on the fireplace's right side (called "harkiso"). The house had a platform for valuables called "iyoykir" behind the shiso. The Ainu placed "shintoko"(hokai) and "ikayop" (quivers) there.