their blood is bitterness, very bitter. you need bitterness to grow. >> anthony: this is italian. agro dolce, at the end of an italian meal. >> masa: exactly. >> anthony: sweet, fat, sweet, fat, at the end of the meal, something bitter to remind you of the sadness. >> masa: this is the umami, too. that kind of sense building, i didn't know that. he taught me this kind of delicacy. he's my maestro. teacher, so. tony, try this. strong, very, right? >> anthony: but you're right, umami. it's deep. >> masa: this is umami. ♪ >> anthony: among izukura-san's many skills, apparently, is a shocking proficiency at making soba noodles. tonight, the soba is paired up with slices of tender duck and green onion grilled over the irori.