  Studies of highly-boosted top quarks produced inclusively in pp collisions at
14 TeV are discussed. The hadronic decays of boosted top quarks was studied in
a data-driven approach by analysing shapes of jet-mass distributions. Using
Monte Carlo models after a fast detector simulation, it is shown that inclusive
production of boosted top quarks can be observed if it has a cross section at
least twice larger than the prediction from the approximate
next-to-next-to-leading-order (aNNLO) calculation for the ttbar process. The
ttbar process with the nominal aNNLO strength can be measured using the masses
of jets after a b-tagging.
