Such as; Sewage Treatment Engineer, “Gesuidou Kanrigijutsu Ninteishiken (Shisetu)”, Sewer Line Engineer, “Gesuidou Kanrigijutsu Ninteishiken (Kanro)”, Aeration Tank Technician, “Joukasou Kanrishi”, Second Grade Electrical Works Engineer, “Dai Ni(2)-shu Denki Kouji-shi”, Sludge Treatment Facility Engineer, “Odei Shori Shisestu Kanrisha”,Dry Equipment Operator, “Kansou Setsubi Sagyo Shuninsha”, Fourth Grade Dangerous Material Handler, “Otusshu Dai-Yonrui Kikenbutsu Toriatsukaisha”, Worker for Special Chemicals, “Tokutei Kagaku Busshitsu-Tou Sagyo Shuninsha”, Confined Space Worker, “Sanso Ketsubou Kiken Sagyo Shuninsha”, Qualified Rigger, “Tamakake Ginousha”, Qualified Gas and Arc Welder, “Gas Oyobi Aaku Yousestu Ginousya”, Mobile and Small Crane Operator, “Idou oyobi Kogata Kuren Untenshi”, Septic Tank Technical Manager, “Joukasou Gijutsu Kanrisha”