What dish?: Japanese chicken skewer wrapped in a green leaf and sour red sauce
It looks like tsukune/tsumire chicken with shiso, search terms are chicken tsukune, ooba and plum. This yields some recipes, more without the plum, basically take minced chicken, add egg mirin soy sake potato-starch, divide, wrap in leaf and cook. Google translate/rikaichan will help you. For the plum sauce, basic recipe is to take Japanese plum pulp and add soy, not sure it is easy to do otherwise since it requires the special sour and salty plums.

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