They sell unique letter sets which have triangle and star- shaped envelops and are difficult to find in Japan. They seem to have a lot of customers from Japan, as we found some descriptions in Japanese!
Address: 61 rue St-Martin 4e Phone：01 42 78 01 18 Closed: Sunday
Brocant, Boutique and Tea salon Mamie Gateau
They have those 3 shops on the same street. Each one is beautifully decorated as French country chic.
The owner in the picture is in charge of Brocant and Boutique and her Japanese wife is in charge of tea salon. We had a wonderful lunch there.
Address ：66 rue du Cherche-midi 75006 Phone：01 42 22 32 15 Closed: Sunday and Monday
I'm sure you living in Europe know this very well, but unfortunately we don't have Oysho in Japan! They have pretty inner wear.
They have 5 shops in Paris. This is one of them.
Address：74 rue du Rivoli
Entree des Fournisseurs
You can get anything about sewing. There are buttons, ribbons, yarn, fabrics and embroidery materials!
Address： 8 rue des Francs Bourgeois 75003 Phone：01 48 87 58 98 Closed: Sunday
La Croix et La Maniere
You might have seen her works somewhere before. Some books are sold in Japan as well.
Monique Lyonnet is a well known cross stitch artist.
They sell linen and fabrics in light and soft colors, which is totally her taste.
Address：36 Rue Faidherbe 75011 Phone：01 43 72 99 09 Closed: Sunday and Monday