Member of    
  Japan Contractors Association of Traffic Signs and Lane Makings
     
    Hokkaido Contractors Association of Traffic Signs and Lane Makings
     
  Technical Association of Resin Pavement
     
Related group    
  Japan Construction Training Center
     
  Hokkaido Vocational Ability Development Association
     
Alliances    
  Shinto Paint, Inc.
     
  ATOMIX, Inc.
     
  Gakunan Kohki, Inc.
     
  Bishu Kousan, Inc.