While we're here with fun facts. I've been living here for ten years, and haven't needed a registered seal until recently. To register my seal (using katakana) at the city hall, I needed to register my katakana name at the city hall too, which I never needed and had never done. How do you that? By presenting a somewhat official document with your katakana name, which none of the official IDs (resident card or driver's license) have. The document they would accept are a cash card or a passbook from a bank. How did the bank get my katakana name in the first place? I made it up. So what's the point? Who knows.