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Coke plays a role as a reducing agent of iron ore, a heat source, and a spacer in blast furnace operations.1,2) Coke strength and its reactivity are important factors to improve efficiency of blast furnace operations.3,4) Ferro-coke is known as coke with high reactivity, which is produced by adding iron ore to coal in coke-making processes.5,6) Ferrocoke has been investigated for its strength and reactivity. For example, Nomura et al. showed that iron ore decreased expansibility of coal particles though ferro-coke has high reactivity.7) Yamazaki et al. reported that a decrease in expansibility of coal particles caused a decrease in their adhesiveness, and coke strength decreased.8) Therefore, it is necessary to enhance strength of ferro-coke by improvement of adhesiveness of coal particles. To improve strength of ferro-coke, blending HPC (Hyper-coal) into coal particles in coke-making processes has been investigated.9) Okuyama et al. showed that HPC softened in low temperature and had high fluidity, and demonstrated that blending HPC into low-quality coal contributed the improvement of coke strength.10) Koyano et al. reported that a binder including polycyclic aromatic Effect of HPC (Hyper-coal) on Strength of Ferro-coke during Caking Temperature