It’s said that the three great sake-producing towns in Japan are Hyogo Prefecture’s Nada, Kyoto’s Fushimi, and Hiroshima Prefecture’s Saijo. Our reporter Mari Morimoto, who grew up in Osaka, near Kyoto, had heard of Fushimi, but being a relative sake neophyte she didn’t know anything about Saijo. Even though she’d visited Hiroshima…