The fundamental mechanism how heterogeneous hepatic macrophage (Mφ) subsets fulfill diverse functions in health and disease has not been elucidated. We recently reported that CCR9 inflammatory Mφs play a critical role in the course of acute liver injury. To clarify the origin and differentiation of CCR9 Mφs, we used a unique partial bone marrow (BM) chimera model with liver shielding for maintaining hepatic resident Mφs. First, irradiated mice developed less liver injury with less Mφs accumulation by Concanavalin A (Con A) regardless of liver shielding. In mice receiving further BM transplantation, CD11b F4/80 hepatic-resident Mφs were not replaced by transplanted donors under steady state, while under inflammatory state by Con A, CCR9 Mφs were firmly replaced by donors, indicating that CCR9 Mφs originate from BM, but not from hepatic-resident cells. Regarding the mechanism of differentiation and proliferation, EdU CCR9 Mφs with a proliferative potential were detected specifically in the inflamed liver, and in vitro study revealed that BM-derived CD11b cells co-cultured with hepatic stellate cells (HSCs) or stimulated with retinoic acids could acquire CCR9 with antigen-presenting ability. Collectively, our study demonstrates that inflammatory Mφs originate from BM and became locally differentiated and proliferated by interaction with HSCs via CCR9 axis during acute liver injury.