[Journal of the Physical Society of Japan Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013) - Tokyo, Japan (August 5-9, 2013)] Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013) - Magnetic Properties of Li 2 ZrCuO 4 which was Regarded as a Quasi 1D J 1 – J 2 Magnet near a Ferromagnetic QCP