Takara was responsible for producing Blythe dolls from 2001-2021. During this time, they also made a variety of accessories, including dress sets, furniture, stands, etc.
Bla-Bla-Blythe has a great website with the information about all of this, which can be found here.
Blythopia also has a wonderful list of the Takara Dress Sets and Takara Shoe Sets.