Washington's Original Sushi House.
Sushi-Ko was Washington's first sushi place. It is the "grande dame" of sushi places. It is simple and spare like being in your Japanese "obaasan" (grandmother's) house eating very well put together, fresh fish. For someone eating sushi for the first time, they will get great, impeccably fresh fish.
That said, Sushi-Ko lacks creativity, energy and excitement. It's often a little over-priced. Usually crowded on weekends and at holidays. It's dependable, but I haven't seen anything exciting there in a long time.