Nichitsu Mine (日窒鉱山) was a bit challenging for us. I have been so many times to the abandoned town of Nichitsu, always passing by the mine but never dared going in. I eventually did, during a nice sunset in autumn. We had to cross a dangerous bridge to access the mining area, from where we could be perhaps be seen by the guards, still around. Only a very small portion of the mining complex is actually abandoned and the Nichitsu troops are everywhere.