This study was carried out to evaluate restoration process of a few wetlands in the National Institute of Ecology
(NIE). Wetlands were composed of the former rice paddies that passive restoration was led through only natural
process and by creating waterway, and an ecological pond, a reservoir that restorative treatment was practiced. As the
result of analysis on landscape change in the current wetland space, existing wetland in NIE was usually from the
former rice field and some parts were from the residential area or forest. Change of species composition was
progressed from crops or ruderals resistant to human interferences to plant species, which has removed artificially for
cultivation and grow usually in the typical wetland. Both species diversity and occurrence of exotic plants were the
highest when restoration project is in progress and stages after and before restoration were followed. In an ecological
pond that restorative treatment was done, vegetation introduced as riparian buffer was established successfully and
thereby it was expected that it could contribute to buffer environmental stress comming from the outside. Synthesized
the above mentioned results, change of wetland vegetation established in NIE resembled the typical trend of early
successional stage occurring in the abandoned rice paddy and consequently, it was estimated that successful
restoration is under progress. Restoration under progress in an ecological pond where artificial aid in the least level
was added, could be evaluated in successful as well. In particular, successful establishment of buffering vegetation,
which can play diverse ecological functions, could be evaluated as significant restoration effect. But adaptive
management to improve ecological quality for the section that buffering vegetation is insufficient, is required.