If you found this drama to watch because of Ohno Satoshi, then you're in luck! I like watching Ohno Satoshi's dramas because he delves deep in to each role and (to me) appears as if he is a completely different person! However, in "Kagi no Kakatta Heya" its like his personality and traits carry over in to Enomoto Kei as a person, and you can see that it's Ohno Satoshi. If you watch, then you may understand. But, this is just my personal opinion! Toda Erika was amazing in this drama, completely different from how she was in the "SPEC" series and movies, and from her role in "Ryusei no Kizuna". I really liked Sato Koichi in this as well, it was my first drama that I've seen him in, but he seemed to portray a lawyer as if he really was one. I also liked that there wasn't a lot of difficult, technical lawyer/police/detective jargon to follow. This is a wonderful show; I lost myself within the story multiple times and was so amazed when the episode ended! Hahahaha!! This is a good show to watch if you like detective stories that are actualy about detective work and not filled with romance, filler episodes, or excessive drama. It doesn't get straight to the point but instead actually searches for answers; I like that it isn't so easy for some of the answers to be found. Again, you may understand my review more if you watch the series.... But I do recommend that you do!