Boil water in a small pot, add Harusame bean threads, and stir. Cook/rehydrate according to the package. Strain and let cool.
Cut Kinshi Tamago very thinly. Cut cucumber and ham thinly too. Cut Harusame into 2"-3" long pieces.
In a large bowl, mix the rest of the ingredients for the dressing. Add the Tamago, cucumber, ham and Harusame and mix.
Chill in the fridge for 30 mins to 1 hour before serving.