Radio Engineering: First Class Maritime Special Radio Technician / Second Class Maritime Special Radio Technician Joho Tsushin Shinko-kai (Information and Communications Advancement Association) Price: ¥1400 #Joho Tsushin Shinko-kai #book #Electrical/Mechanical/Electronic Communications The name written on the top of the book has been erased with a marker! There are some lines drawn with a highlighter. There are some scratches and stains.