The observation of aquatic floras in Lake Shinji and in some river inlets located nearby the mouth of the River Hii in Hikawa Plain, Shimane Prefecture, Japan, was done in 1994, to follow up the temporal floral changes from 1985 to 1994. In conclusion, while Cabomba caroliniana, Eichhornia crassipes and Utricularia sp. were newly found, Najas marina and Sparganium fallax could not be found in 1994.