The weirdest payment method has got to be the Coke ON vending machines that do not support SUICA but instead require you to QR code-IR blaster you to a website where you bluetooth pair with the vending machine then buy it on your mobile browser.
Like....somehow they turned a sub 1ms operation into a 4 minute 32 second one. It boggles the mind
Coke ON Pay uses an app that automatically pairs with the machine when you open it [1]. It’s pretty quick and takes less than 30 seconds once you get the hang of it.
I think you might be referring to QR de Kessai [2], which was introduced in 2023 and is targeted more at inbound international tourists who don’t want to download the app and may not have an E-Money card. Basically they aim to support to support the widest possible audience - at the cost of a slow/clumsy experience. These machines should also accept payment via the faster Coke ON app method and often have E-Money tap-to-pay options too.
From that perspective it kinda sorta makes sense. But yeah I wouldn’t bother with it unless I was dying of thirst and I had no cash or other payment options available.
[1] https://szabo.jp/2021/05/16/coke-on/
[2] https://en.ccbji.co.jp/business/installation/qr-de-kessai/