To make the broth taste authentic, we'd better use miso but I couldn't find it from Fanling so I replaced it with a similar fermented product which is
Puning Bean Paste 普寧豆醬. I prefer this one over brown bean paste because the shape and the colour look similar to fresh soybeans. They should be an acceptable alternative for miso. I was actually quite happy with this broth as it tastes so Japanese even without a single Japanese ingredient. (Again, no offence to Japanese cooking.)