KTRT Joint Venture, or abbreviated "KTRT JV" or shorter "KTRT", indicates the organization formed among KUMAGAI GUMI, TAIWAN KUMAGAI, RSEA, and TA-YO-WEI. KTRT JV as a team with mastery of architectural, constructional, and electrical/mechanical/plumbing techniques was renowned for main-contracting "Taipei Financial Center (Taipei 101) Project", one of the world's tallest skyscraper and the greatest construction project in Taiwan ever.