Seireitei.
Sunlight Tower had already risen. It was enormous, visible even from Rukongai.
Once the tower's structure was complete, the final step was to build the signal base station. This task was handed to Twelfth Division Captain Mayuri Kurotsuchi. Captain-Commander Genryusai Shigekuni Yamamoto had some inexplicable concerns about it and also assigned Shunsui Kyoraku to supervise the construction.
But Kyoraku knew practically nothing about something so specialized. This responsibility was merely a sinecure. He figured that Mayuri's research capabilities were certainly no worse than those of people from the Living World, so nothing should go wrong if the matter was left to him.
Captain-Commander Yamamoto thought the same. He specifically instructed Mayuri to conduct a thorough technical review and absolutely not allow anything harmful to Soul Society to enter.
Mayuri also gave the Captain-Commander his word. "Leave it to me. You have nothing to worry about."
And so, the gate between the Living World and Soul Society opened once more. A massive sphere radiating interwoven purple and white light was transported inside.
Under the watchful eyes of countless people, it was placed atop Sunlight Tower. Purple radiance spread outward while white light condensed inward, like a less dazzling sun suspended above the heads of countless Shinigami.
Many people wondered what it was, while the Twelfth Division began publicizing it as a product of Living World civilization. With it, Seireitei could introduce some of the Living World's technology.
The Living World within Soul Society's original world had already reached a modern technological level. Most Shinigami had seen electrical appliances and were not unfamiliar with them, but after proper guidance, the ninja world's technology differed greatly from modern technology.
The greatest difference was that ninja technology consumed very little energy and was far more convenient.
After Sunlight Tower was completed, a Senkaimon