Victory in the War of Resistance Sign-In System: Building a Nuclear Bomb by Hand from the Start

Transmigrated to 1937 with the Victory Sign-In System, I get a random piece of absurdly powerful technology every 24 hours. Today, I hand-build a nuclear bomb. Tomorrow, I mass-produce Gundams. The day after, I turn Mount Fuji into an active volcano! Infinite upgrades: from single-soldier nuclear landmines to orbital space cannons, and then to star destroyers. My combat power grows exponentially! Watch me crush the Japanese scum across the entire universe!!

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.