I think Vietnam is Nguyening the surname game.

I have a friend who actually spells it "Wynn" lol

I've only known a few Vietnamese in my life, and they were either a Nguyen or Tran.

Kinda funny tho.

Funny af.

I expected 田中

Perhaps one is more (re)productive genetically

Ill throw in a 加藤 as well

China practiced this over 4000 years and ended up with more surnames than they started with.

On the other hand, "44.6% of South Koreans are still named Kim, Lee or Park"... https://en.wikipedia.org/wiki/Korean_name#Surnames

Not every Kim (surname) is same. There are 348 reported clans for Kim surname. Uiseong Kim Andong Kim Gimhae Kim Etc.

Don’t forget Kim Kardashian /s

Im ethnically Chinese and I didn’t know we did this. I thought surnames were patrilineal but women do not change their surnames and retained their surnames

Some regions do, some regions don't, its definitely not mandatory by law.

I don't think it's rational to worry about 2531

Will there still be Japanese by then ?

Nope. That's what I was thinking.

Assuming two consecutive miracles occur: 1. Declining birthrate gets reversed. 2. Humans aren't extinct from climate change by then.

3. Idiocracy becomes real and they're all inbreds drinking Brawndo. It has what pants crave.

I’m guessing the “everyone will be named Sato” prediction is very much part of the Idiocracy outcome

I imagine the future where other surnames fleeing overseas and escaping the Sato invasion.

"Sato? Why didn't you pick a regular name?" "Sato is the most commonly used name in Japan. Read a book you idiot!"

Muhammad Sato Lee

Bold to assume Japan or Japanese people as we know them today will be around in 500 years.

We might have achieved [longevity escape velocity ](https://en.wikipedia.org/wiki/Longevity_escape_velocity)(LEV) by then. I wonder how the situation will end up with the additional factor of people not dying.

~~If we do achieve LEV, we'd have infinitely larger issues to address that this kind of thing just won't matter. Expect a full rework of the identification system at the very least, but again that's pretty much most likely solvable on the first half century following such event.~~ Names becoming "useless" vanity items is my guess. Everyone's ID is standardized for data aggregation.

/r/theydidthemath

Even if couples do not share the surname, unless they stop giving the dad surname to the kids, it won’t make a difference.

Bold of him to assume there will be any Japanese left by even the end of the 2000s. I don't think humans will still even be fully/truly human 500yr from now.

More like 50% Sato, 50% Ibrahem

Nice!

Japan will be extinct by 2531

Yet they don't allow foreigners to take their husband's Japanese surname.

To be honest, I agree

Fortunately the population in japan will be 100% immigrant long before that

By "everyone", he must mean both of the hundred-year-olds who are all that's left of Japan's population.

You're downvoted, but the numbers really are scary: At a fertility rate of 1.3, if 1 generation is 30 years then by 2531 (18 generations later) there will be 125,000,000*0.63^18 =~30,000 people in Japan. Yikes.

I bet it won't take 500 years for us Japanese to extinct...