SAI’s piracy was driven by two main factors: accessibility and technical simplicity. In its heyday, purchasing SAI was an exercise in frustration for Western users. The website was primarily in Japanese, required specific currency conversions, and lacked the streamlined "one-click" checkout of modern SaaS platforms.
Pay for software when possible — it protects you, supports developers, and ensures a safer, more reliable workflow. If you can’t purchase SAI right now, use high-quality free alternatives like Krita or Medibang until you can obtain a legal license.
Unlike modern software that uses cloud authentication, SAI uses a machine ID file. If you upgrade your PC's motherboard or CPU, your license breaks. Getting a new key requires emailing SYSTEMAX in Japanese. Frustrated international users, unable to navigate the language barrier or wait 48 hours, turn to cracked R versions that bypass this hardware lock entirely.
The rare, clean crack. The software opens. The perspective ruler works. No viruses. You feel like a king. But you will never update it, and every antivirus scanner will flag it as a "HackTool" (which, technically, it is).
The software is developed and maintained by a single person, Koji Komatsu, operating as SYSTEMAX Inc. .