Butter and soy sauce go so well together. The umami of the scallops adds even more flavor.
When I bought baby scallops from a greengrocer in my neighborhood that also sells seafood, he store owner told me that they're delicious stir fried with butter and soy sauce. So I tried it out.
Once you add the butter and soy sauce, finish up quickly. Otherwise the flavour of the scallops, butter and soy sauce will evaporate..
Enjoy Japanese food around the world.