To investigate the prevention of fusion of DNA condensates by the coating and armoring, we observed collision events of coated and armored DNA condensates using the 3D DNA origami of the one-sided binding design with 20 condensate-binding tags (Figure ). The collision events were caused by shaking the observation chamber (Figure ). When the coated DNA condensates collided, the DNA origami membranes of the coated DNA condensates were unified, and the inside DNA condensates fused (Figure ). This result suggests that DNA origami accumulated at the surfaces has been rearranged after the collision. On the other hand, in the case of the armored DNA condensates (Figure ), the DNA origami membranes were maintained, and the DNA condensates were prevented from fusion even when they collided (Figures and). However, some armored DNA condensates fused, suggesting that the armoring connectors should be added as soon as possible to prevent the fusion of unarmored DNA condensates.