I am a little late in posting this but on the 1st July, Disney Sea Japan has introduced a new character.
At the moment, like Duffy, he is only sold at DisneySea Japan and not Disneyland Japan.
And like Shellie May, he is only sold in Japan. (You can buy Duffy in Hongkong Disneyland now but not Shellie May.)
See more at the official page
Have a good weekend!