[exhaze]

If you want to really double check - tell them "it's cool how you guys also take the plastic ring off plastic bottles, not just the cap"

If they say yeah we do that that is 100% confirmation that they do not live in Japan.

Super tech-specific one - ask them you want to make sure they're Japanese so you'll ask them to write something every developer can write in... 5-7 seconds max. When they confirm and are waiting, ask them "at your previous/current company or your friends' companies, how do people name their personal channels? what is the specific kanji ppl put at the end?"

This kanji is super hard to google and even harder to write phonetically, but every Japanese engineer who has ever used Slack knows how because there's almost like a "hack" for writing certain other characters that end up getting converted into that kanji.

This is so fun - 1 more:

Ask them what their favorite hummus flavor is. Basically no one in Japan (even people who have lived outside of Japan) knows what hummus is (I guess Slack even tried to teach them by making it a notification sound lol)

[coderc]

I googled his discord identifier (not the display name, but the one you can't change), and it is apparently an Indonesian surname, so I think you're right, he's not Japanese at all.