Most Japanese Miso has added alcohol to enhance the taste. Just a month ago, i dropped by Isetan Orchard to check out any suitable halal japanese items to add to my mini-NTUC panty unit (that's what most of my friends said about my pantry unit, it has many many food and condiments). My husband likes miso soup so i was checking for any suitable miso paste. Found this miso has no added alcohol which is shown by the blur pix's red label. The ingredients are just soy bean, rice and salt. So this should be 100% halal. So hope this will be useful to ppl out there craving for halal miso.
To make miso soup, all u need is water, miso paste (add to your own preference), dashi powder (replace by ikan bilis maggie cube). Then just dump in what u want to be 'swimming' inside your miso...u can add fresh seaweed (can be purchased from NTUC), tofu (cut into small cubes), straw mushroom etc.
If you are interested to buy the miso paste, u can check out the miso website for more information.
http://www.maruman-miso.com/2syouhin_miso.htm