Kabukuri-numa Information

Site Information


aerial photograph

Kabukuri-numa is a low land marsh covered with aquatic plants that has preserved a primeval landscape. As this area is a flood plain of about 100ha with a cone-shaped basin, river water gathers round the marsh when it rain heavily, and has often overflowed into the surrounding rice fields. The national and prefectural governments have enclosed these wetlands with dikes to manage this area as a floodwater reservoir (max. 15.8 million m3) and to protect the surrounding areas from flooding.

The ordinary view
The flooded view (Aug.31.1998)

There are vast rice fields around Kabukuri-numa that waterfowl wintering in this marsh use as feeding areas. There is, however, no legal protection that has been offered because some local farmers have a strong dislike of the birds that occasionally feed on their crops. However, hunting has been restricted by an agreement between the local government and the hunters. In addition, the disturbance and overuse by bird watchers is increasing since Kabukuri-numa is gradually becoming more widely known.

Rice fields in autumn
In winter, feeding areas of geese

Kabukuri-numa has become relatively shallow because of decaying plants, mud and sand buildup, and because the river connected to the marsh has been widened, for this reason, aquatic plants that grow near the waters edge are decreasing. Taking this into consideration, it is necessary that we organize a Kabukuri-numa management plan to preserve the biodiversity of this site, and take measures to cope with this situation immediately.

vegetation map 1985
vegetation map 1996
Actual vegetation map

(Zizania latifolia community and Open water areas decreased during 11 years.)