Curtain-Kan "MADO"
3-4-4-A Nakacho, Musashino-shi, Tokyo, Japan
http://www.lexpo.co.jp/mado/index.html (in Japanese only)
They make curtains to order and have around 800 fabrics to choose from.
Phone: (0422) 55-4181, Fax: (0422) 55-4182 (15 minute walk from Mitaka station)
Make reservation/appointment. By email OK.
e-mail mado.koshikawa@nifty.ne.jp
No English though. They do house calls within 100 km so even though they are in Mitaka, you can still have them visit! They also have loan curtains available while getting your order ready. There was a 20% discount coupon on material and tailoring on the Sony "from-hanna" site, but that site is gone. I think you can ask for 20% discount and maybe they will give it to you.