Shiojima is fictitious, but the setting (the sea and the islands) is real.

Naai part dri nga dghan kaayo bridges which is popular among cyclists... :) It's called Shimanami Kaido... It connects Hiroshima (main island) to Ehime (Shikoku) through multiple islands and bridges... Nice kaayo ang view... Watch nya mga videos about it... makaremember ka sa A Letter to Momo. :)