There is a store which carries clothes and fabric for Japanese Shinto festivals with traditional Edo Monyo patterns in Asakusa.
The traditional festivals have been always big event for me as a Tokyo local since I was a little girl and look forward to getting new things at this store every year.
Those things above are all mine.
I bought most of them from this Myogaya except the shirt and obi (belt for traditional clothes).
2-27-12 Asakusa, Taito-ku, Tokyo