One of great places to find halal food is Ueno. Many halal food stalls is established there. Halal chicken stall, kebab, ramen, etc. One of the first halal food stall I have tried there is Chicken Man. Located in Ameyoko street, exactly beside the famous Doner Kebab. It is super yummy! Only 1200 yen for a whole chicken. Worth the money. Happy tummy, happy me!