As mentioned in the following article, HALAL bento has been available at JR Tokyo station since April 2016.
https://halalmedia.jp/archives/12317/bento-shop-in-tokyo-station-zenmai-started-to-sell-halal-bento/
HALAL Baumkuchen is now available at the convenience store “NewDays” inside JR East stations, making HALAL food much easier to purchase.
Details are as follows.
■Product name : HALAL-certified super moist Baumkuchen
■Product characteristics : It is a HALAL-certified Baumkuchen with moist texture.
■Price : 160 yen (including tax)
■Date of sale : 2017/2/14 (Tues)
■Stores that sell them
・ND Shinagawa
(Located right to the stairs and escalator at Tanakawa gate of JR Shinagawa Station)
・ND Shinagawa Central Exit
(Beside the ticket vending machine in front of the North gate of JR Shinagawa station)
・ND Hamamatsucho
(Outside the ticket gate of JR Hamamatsucho station)
・ND JR South Shinjuku Building
(JR South Shinjuku Building 2F Entrance)
・ND Ueno Central gate
(Beside the ticket vending machine in front of the JR Ueno station Central gate)
・ND Ecute Ueno Park Pathway
(JR Ueno station 3F Ecute Ueno Park pathway)
・ND Ecute Ueno Great connecting bridge
(JR Ueno station 3F Ecute Great connecting bridge pathway)
・ND GRANSTA Marunouchi South Entrance
(Outside the ticket gate of Marunouchi B1 South Entrance of JR Tokyo Station)
・ND Oosaki
(Inside the ticket gate of JR Oosaki Station)
・ND Kamata
(2F Concourse of the ticket gate of JR Kamata station)
■Notes
It may be sold out depending on the store.