Taking a couple Japan newbies around, I wanted to check out a good okonomiyaki place in Hiroshima, but the usual suspects like Mitchan or Yotchan, but for the newbie, one of the stalls from Okonomimura seems a better introduction to Hiroshima style okonomiyaki since it has such a festive atmosphere. Our first choice was Hassho on the 2nd floor (on the far left out of the elevators), since that's the only place among the Okonomimura places that's mentioned in the food guides. But as Hassho was full, we decided to take the four remaining seats at the place next door, Chiichan, rather than waiting next door. It was a good thing too, because the people at Chiichan make a pretty good okonomiyaki. Since it's the season and the Hiroshima specialty, I got the oyster okonomiyaki. The other orders were a plain okonomiyaki (pork and egg), and two Chiichan specials, which contain shrimp and squid. As I've mentioned in the past, Hiroshima okonomiyaki is different from the kansai style in that everything is cooked separately, while the ubiquitous kansai style mixes everything into a batter. (see post: http://www.chowhound.com/boards/intl/...)
The oyster okonomiyaki was a treat. Oyster really stands up to okonomiyaki, I think better than squid or shrimp, since the flavor of oyster is not something you can cover up so easily, as you could with squid or shrimp. Or it could just be my preference, but either way, it was good stuff. And the okonomiyaki in general at Chiichan was much better than the experience I had at a random Okonomimura joint last year. I think Chiichan is a keeper.