BY NARUMI OTA STAFF WRITER
Katsuhiko Hibino shows off a shard of a "chawan" cup and an octopus trap found under the sea near Teshima island on Nov. 19. (Narumi Ota)
Katsuhiko Hibino picks up a board found in the bottom of the sea off Teshima island, Kagawa Prefecture, on Nov. 18. (Provided by Shin Yoshizaki)
TESHIMA, Kagawa Prefecture -- Inspired by dives off the city of Alexandria that recovered artifacts from the age of Cleopatra, contemporary artist Katsuhiko Hibino decided to comb the Seto Inland Sea for "hidden" treasures.