Being the fan of Japanese horror that I am, I couldn't pass on this "Higanjima", for a number of reasons: the tremendously interesting premise and setting (a remote and pictoresque Japanese island taken over by a bunch of vampires!), the fact that it wasn't subbed (more often than not, at least recently, that's kinda proof of a series' potential - the ones getting subbed being more and more often the "westernized", modern ones that copy abundantly from Hollywood and/or South Korea) and last but not least, the cast (I've always been a big fan of Satou Megumi, an actress I really love and can't help but think she's horribly underrated, alas; at the same time, I also really like Suzuki Ryohei).
Upon watching it, I can in all fairness say that I wasn't let down.
True, the series could have been even better (heck, "freaking masterpiece" would be the right definition then) if it had had a more brilliant and conclusive finale. But it's still a very solid 8 in my book!