Not quite. Father in law is from Germany so no 12 months 40k฿. It's an income statement from his embassy (Affidavit) or the 400k฿ or the combination method (Total of 400k฿ income and banked money)
. If they see the sticker in the passport they almost certainly use that. But you can ask the imm. officer. Should you have an E-visa (printed .pdf) your chances are a bit better, but still not sure they do that. Think they can see in their system you have a tourist visa. Not sure about that.