Halal Japan is glad to announce that melon pan being sold at various 7-Eleven stores is considered halal by scholars. You may buy it if you wish to. However, there is a word of caution. The melon pan being offered at 7-Eleven stores in the Kyushu area is not halal as it contains pig-related ingredients. So, the Muslim residents in that region can not consume this bread.
The bread is free from non Halal ingredients. Shortening, Margarine & Fat spread are all plant based, and free from cross-contamination with pig derivatives.