If I'm not mistaken, this has been one of my first episodic jdorama. Not expected though simply because I don't know much about Jdorama that time. LOL. Sumi-masen! :DD Okay, this drama was based on the novel series that follows an episodic format with various stories. The shows focuses on the three (3) characters solving each crime. Ohno Satoshi's being a "robotic and eccentric" somehow I get the feeling that he has this mysterious past from the beginning actually. Sato Koichi made me laugh seeing his face when he react. Toda Erika, the lawyer-who-always-tailing-his-boss around plays a heartful and innocent young woman. At first, I nearly can't recognize her, hhhmm.. Hearing her voice here were in a low pitch. Well, still liking her husky voice though. But.. seeing her role as "Saya Toma" in Keizoku 2: SPEC were already haunting in my head and suddenly switching from this one which is a normal made her looks so different. :D What interest me is that they're not police or detective. They are mainly "Two Lawyers and One Security Otaku" though when you think about it, it's a sensible decision. It has the same directions with Trick classic series though it doesn't interact in other way because Kagi seems to borrowed some elements from Trick which makes it an uncomfortably atmosphere and that they presented every clues as provided where to look. This is not some detective series that treat the viewers like an "Idiot" and goes beyond reality. There's some drama explaining some things that are not necessary in detail. Don't get me wrong! I didn't mean to be rude. But that's it. There are some soundtrack that reminds me of Nancy Drew, Sherlock Holmes and Agatha Cristie and I can visually "them" when I hear those OST. :)) Anyways, I'm familiar with Locked-Room-Cases and so If you're a fan of mystery dramas, there are far more mediocre or worst than Kagi no Kakatta Heya. The cinematography, OST and those close-ups shots has made it an enjoyable one. I'm not biased though. Haha! :)