Kimura Commerce Chamber's Black Oil warehouse was hidden within a dense asteroid belt, likewise requiring the use of a secret accelerated orbit to reach. It wasn't present on common flight paths, and in the vast Star Domain, it was only occasionally that a mining or smuggling ship would pass by.
Within this asteroid cluster, a portion was also fake, simulated by Kimura Corporation using virtual signals to obscure the path and disrupt radar. Therefore, without auto-navigation, few pilots could make it through, further reducing the traffic in this dangerous area.
As a corporate executive like Kimura Gorou, he controlled the hidden routes through the area. That meant, if anyone wanted to come for a trade and pick up goods, whether entering or exiting, they had to hand over control of their ship to Elena for piloting, also stop navigation, and disable radar, without the ability to mark the location of the other party's warehouse.