The stats section for the 87th Spring Koshien is now online. It is updated through to the end of March 26 (Thursday). I haven't really had a chance to check things completely, so you might come across some oddities. If you do, please tell me about it, either by using the comment form below, or by dropping me an e-mail at gen [at] yakyubaka [dot] com.
BTW: I already know about Matsuyama Higashi being registered as Matsuyama (Higashi). This will be fixed during the next update.