Tokai Radioactive Ion Accelerator Complex (TRIAC) constructed by High Energy Accelerator Research Organization (KEK) and Japan Atomic Energy Agency (JAEA) started to supply the 0.178 to 1.1 MeV/u radioactive nuclear beams (RNBs) for experiments since November 2005. The TRIAC facility is an Isotope Separator On Line (ISOL) based RNB facility, and uses a tandem accelerator (primary accelerator), an ISOL, a charge-breeder of electron cyclotron resonance type, and a heavy-ion linac complex (post accelerator). Several experimental studies have been performed successfully using 8Li beams with various energies. In order to increase the beam energy up to 5-8 MeV/u, it is planned to connect the heavy-ion linac to the superconducting linac existing at JAEA tandem facility.