It's said that kazunoko (herring roe) symbolizes fertility and family prosperity.
Salted Kazunoko
From Setsuko Yoshizuka, former About.com Guide
Kazunoko
Photo (c) Setsuko YoshizukaSuggested Reading
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From Setsuko Yoshizuka, former About.com Guide
Kazunoko
Photo (c) Setsuko Yoshizuka