Possible Japanese Ko-Kutani ewer

Hello,

I have a Japanese ewer, which I believe may be Ko-Kutani.  I am having trouble translating the symbols other than Kutani and Tokyo.  I would appreciate any help as to the possible era of this piece and what the symbol stamped on the bottom means.  It's about 7 1/2 inches tall.  The flowers and leaves are raised.

Many thanks!!   Marilyn

Fair