This paper presents our recent progress for the development of low-loss Bi2223/Ag tapes with interfilamentary oxide barriers. For the compatibility with Bi2223 superconductors, SrZrO 3 was selected as barrier material. Moreover, small amount of Bi2212 was mixed with SrZrO 3 to improve its ductility for cold working. By controlling the thickness of barrier layers among the filaments, reducing the tape width (<3 mm) and twisting the filaments tightly (<5 mm in twist pitch lengths), coupling frequency f c exceeded 250 Hz even in an AC perpendicular field at 77 K. Transport J c of the barrier tapes with tightly twisted filaments was in the range of 12–15 kA/cm 2 at 77 K and self-field. At 50 mT and 50 Hz, the twisted barrier tapes showed 60%–70% lower perpendicular field losses than the conventional 4 mm-width tape with fully coupled filaments.