Where to buy hot dog and hamburger buns?

Hello:

This one is a head scratcher!?
Where can one buy hamburger buns and hot dog buns
in Japan?
Go to most bread section, they seem to be a hard find but
are plentiful at your nearest McDonald's, Wendy's, etc..

Thanks

Might be a high price, but sell to Kinokuniya.
http://www.e-kinokuniya.com/kinokuniya.pdf
http://www.super-kinokuniya.jp/eshop/items/06-4960466114818/index.php
http://www.super-kinokuniya.jp/eshop/items/06-4960466114511/index.php
There is no shop in the center of Tokyo, it is sold at Costco.
(Hot dog buns)
http://www.costco.co.jp/p/locations?lang=en
So far, I've found only these.

We have no idea where you are in Japan, but The Meat Guy delivers anywhere in the country: http://www.themeatguy.jp/app/en/products/index/42#content-top

They also sell very nice burgers and sausages to go with the buns.

Hot Dog buns are available at your local supermarkets.
http://www.the-seiyu.com/front/commodity/00000000/4902410245261/
http://www.the-seiyu.com/front/commodity/00000000/4901820340443/
http://www.pasconet.co.jp/chojuku/lineup/pro04.html
Visit large supermarkets around lunchtime. They don't have much stock in so all sold out by later trading hour.

Hamburger buns are less demand these days. Visit your local baker for that.

If you're near a Costco, they carry them too.