List of companies-Construction/ Equipment/ Electrical/ Engineering- NANBA Co., Ltd.$ #YAMAZAKIGUMI Co., Ltd.$ # JLPT N3以上Nagaoka Motor Development Co., Ltd.$ #Ohara Corporation$ # JLPT N3以上DAICHI$#Hokuetsu Engineering Co., Ltd.$ # JLPT N3以上DAISHI Co., Ltd$ #KUBOSEI ELECTRIC$ #ETRUST Co., Ltd.$ #Omni Giken Co., Ltd.$ # JLPT N2以上