King Of Wagyu, also listed as KOW, is a butcher at 25 Bali Lane, Kampong Glam, Singapore, rated 4.9 from 81 Google reviews.
A good butcher is judged on the cut, the freshness and the advice. Wagyu grades are marked by marbling and origin, so ask what the grade means and how the meat should be cooked. Ask how the meat was stored and when it was cut, and whether the butcher can trim or portion it for your use. Check the fat, colour and texture, since these show quality better than the label alone. Regulars often ask for a cooking tip as well as the cut, and come back for the same piece once they know how they like it.
Bali Lane is a small street of shops and cafes in Kampong Glam, so the butcher serves people who are already in the area for a meal or a browse.