$B!!!!(Jlocation of Imou:$B!!!!(J37$B!,(J44' 30'' N, $B!!!!(J137$B!,(J27' 15'' E
$B!!!!(Jheight:$B!!(Jcirca 65 meters high
$B!!(JImou Bog is situated in the eastern part of Toyohashi City, at the western foot of the Yumibari Mountain Ranges which lie from south to north forming the boundary of Aichi Prefecture and Shizuoka Prefecture.
$B!!(JIt is made up of the shallow bottom lands of ravine, surrounded in three directions by the mountains about 250 meters high .$B!!(JThe bog forms a U-shape.
$B!!(JThe hillside behind the bog has a slope of 25 degrees. Imou is situated in the transition point, where the slope becomes gentle.
$B!!(JThe bog is located in the fields 60 to 75 meters high and have the gentle degrees of four to eight.
$B!!(JIn part of the bog area there are abandoned traces of rice fields with the remains of the ridges.
$B!!(JThe bedrocks of chert, in the central part of Imou Bog, are covered with black silt $B!&(Jclay layers.$B!!(JThese layers form very thin outermost layers of soil:$B!!(J10 to$B!!(J20 centimeters thick on average and 40 centimeters at the thickest.
$B!!(JThe soil in the layers have been carried away by the water where the water runs. As a result, the outer parts expose the chert there.
$B!!(JAs mentioned above, Imou Bog has very thin outer layers of soil. Under the thin soil there are bedrocks which water can't infiltrate into.
$B!!(JThis means that this bog has a very poor capacity of keeping water.
$B!!(JNevertheless constant amount of water stays in this bog and fosters life there.$B!!(JThe reason may be as follows:
$B!!(JThere is an inexhaustible source of water supply from the hillsides of the mountains behind the bog.$B!!(JIt is not clear whether the water comes from the underground or the rainwater is saved after the rainfall.
$B!!(JTwenty to thirty tons of water comes down from the mountains to the bog daily, thereby guaranteeing the preservation of life there.
$B!!(JThanks to the bedrocks situated in the shallow places in the ground, the water, what small amount may be,can stay in the layered soils.
$B!!(JTherefore, the water level is always kept high enough to for the bog.
$B!!(JThe water coming from the hillsides of the mountains behind the bog is literally "life line" to all the plants in the bog.
$B!!(JIn order to keep the water running, the plants in these mountains must be taken good care of as well as the plants in the bog.
$B!!(JWithout the water from the mountains, it is impossible to keep the beautiful nature of Imou Bog alive.
4)$B!!(JEcosystem of the Plants
$B!!(JThere are many groups of plants in Imou Bog.$B!!(JIt means a variety of plants grow there:$B!!(Jthose indigenous to this region, those akin to alpine plants and insectivorous plants. And there also grow plants whose central distribution areas are in the zone of cold, though Imou Bog is in the zone of mild climate.
$B!!(JThose plants in Imou Bog are of considerable scientific value.