japanese salad dressing

Hi Maki,

I've been to a japanese restaurant and I asked a bento bok for lunch. It had (among lots of other things) a simple green salad with a dressing that was to die for. I had it on some other restaurants so I guess this is a common recipe...
The sauce was rather... "solid" i guess it has grated ginger... I'd love to dress my salads with it. Can you help me maki? :D

Thanks!! :D

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