You can enjoy Halal-certified bread at SEKAI CAFE OSHIAGE, which recently opened.
https://halalmedia.jp/archives/2991/sekai-cafe-oshiage-at-minute-from-the-tokyo-sky-tree-has-prayer-space-and-japanese-souvenirs/
The bread sold here are certified by JAKIM and directly imported from Malaysia. Prices start from 150 yen. You can also have them to go. Of course, it tastes amazing as well! Please give it a try.
http://www.hiestand.co.jp/en/world-of-bakery/our-assortment/halal-bakery.html