Ep. 6: Yamaoka mencari ikan tenggiri hantu langka untuk mengesankan Kaibara di restoran Hatsuyama.

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The Touzai staff are invited to the re-opening of Hatsuyama restaurant, famous for traditional Japanese dishes and Yamaoka is ordered to attend. Before the meal, Kaibara also arrives and he insults his son's abilities. During the meal Kaibara and Yamaoka are asked to name their favourite sashimi fish. Kaibara names many fish, by Yamaoka names mackerel, a common fish which spoils easily and can cause food poisoning. Kaibara derides Yamaoka's choice but agrees to taste it. Yamaoka travels to Hayama seeking a "phantom mackerel", and goes out on a fishing boat to attempt to catch one. After three days, with the help of a local fisherman, Kurita manages to hook a large one. When it is prepared for the Touzai staff and Kaibara by a sashimi chef, it proves popular and full of flavor. Kaibara tastes the fish, but then storms out, complaining about the ugly design of the plates. However, a few days later, he sends some of his beautiful handmade plates to the restaurant. (Source: Wikipedia)