The effects of the conductive heat flow on the energy transport concerning the temperature profile similarity have been analysed for (\ref{eq1}) high triangularity and (2) Ar seeded ELMy H-mode plasmas on JT-60U. The temperature profiles of the plasma core on the logarithmic plot are shape preserving and independent of the varying pedestal height. As the conductive heat flux increases, the effective heat conductivity, χeff, adjusts itself to sustain a constant ∇(ln Ti) in the plasma core. In high triangularity discharges, highly improved energy confinement quality accompanied by high core temperature is obtained when the boundary temperature rises with an increase in βpol. On the other hand, the peaked density profiles in Ar seeded discharges allow the temperature at the pedestal shoulder to be higher relative to the cases without Ar gas injection, and the core temperature is also raised. As the conductive heat flux is reduced by increasing the radiation loss flux in Ar seeded H-mode plasmas, χeff decreases with a similar ∇(ln Ti) of the plasma core in the case without Ar gas injection. Improved particle confinement due to Ar gas puff raises the achievable density and contributes to the reduction in χeff.