Schistosoma japonicum resides in -
Habitat

S. hematobium: Vesicle plexus (veins of urinary bladder, pelvis ureter)
S. mansoni: Inferior mesentric plexus
S. japonicum: Superior mesentric plexus and its radicles (splenic vein).
Vesical Plexus
Splenic Vein
Systemic Circulation
Gall bladder