This is interesting to read, but the mysteries are lousy. The solutions to the second (and probably the third, since we don't have the official answer yet) mysteries are really obvious, and the first one is just a badly-presented mystery story. (And yes, there is a fairly official way to evaluate the presentation of a mystery story: a well-written mystery story will let the reader/viewer have all the clues before the criminal is unmasked. In that first story, while the detective gives his deduction he lists evidence which we, the readers, did not already have. The Kindaichi series, corny as it sometimes gets, is actually pretty good at making sure it is at least possible to work out the criminal from the clues.)