This paper highlights the recent studies of both edge and internal transport barriers on JT-60U and JFT-2M. In the studies of an edge transport barrier (ETB) on JT-60U in an extended high triangularity (δ) operation with pellet injection from high field side, we clarified the linkage between main parameters determining the pedestal structure. As a result at high δ configuration, the pedestal pressure is enhanced by factors of 2-2.5 at the same plasma current and shape, and the high pedestal pressure is extended the high confinement regime to a high density. In the studies of type I edge localized modes (ELMs), simultaneous fast ELM measurements revealed four different phases in an ELM event. It was also established that the density collapse is poloidally asymmetric and is localized at the low-field side. In the studies of an internal transport barrier (ITB) on JT-60U, the response of the ion thermal diffusivity to the radial electric field (E_r) shear and the effect of electron heating on ITB were investigated. The importance of non-locality and the effective E_r shear will be discussed. We also studied cold pulse propagation in plasma with ITB. Density fluctuation is reduced at the strong ITB in the reversed shear plasma, when a cold pulse induced by a pellet deposition outside the ITB is propagated into the strong ITB. Cold pulse analysis indicates that χ_e decreases by a factor of 3 in the inner ITB portion, and χ_e increases once by a factor of 1.5 at 20 ms after the pellet injection and then decreases to slightly smaller value than that before pellet injection in the outer ITB portion. The time scale of χ_e change is larger (several tens ms) than the time scale of fluctuation reduction (several ms). The change of χ_e might not be attributed to the reduction of density fluctuation. In the studies of an H-mode on JFT-2M, the rapid change of the radial electric filed structure was extensively studied by using the heavy ion beam probe. Recently the fluctuation induced particle flux during L-mode was estimated by using the evaluated wave number of k_θ=1-2cm^-1. The interesting point is that the particle flux shows the bursting behavior during L-mode and disappears after L/H transition.