Japan's Defense Ministry said a submarine was spotted by a P-3C Maritime Self Defense Force patrol aircraft Sunday nightpassing near Kume Island in Japan's Okinawa prefecture in the East China Sea.

WSJ: Japan on Alert Over Submarines Near Its Territorial Waters

Japan's defense ministry said a submarine was spotted by a P-3C Maritime Self-Defense Force patrol aircraft Sunday night passing near Kume Island in Japan's Okinawa Prefecture in the East China Sea.

WSJ: Japan on Alert Over Submarines Near Its Territorial Waters