Marina just gave me an item...

[Raz]

and I don't know why, but it looks like something that is either new to NH or new to the west?

 

[Fluuffy]

The flowers? I’ve gotten them too. They’re pretty but they remind me too much of those flowers they put up during funeral viewing. So it really creeped me out when it suddenly fell from the baloon I popped.

 

[Clock]

It’s a flower sign that is used in Japan, I don’t know much of it, but people use it as gifts to people.

 

[Raz]

The flowers? I’ve gotten them too. They’re pretty but they remind me too much of those flowers they put up during funeral viewing. So it really creeped me out when it suddenly fell from the baloon I popped.

Yeah, it also reminds me of some kind of decoration of a festival or something like that

 

[cylin]

I heard this kind of flowers are used inn Japan when a store new opened. So it means congratulations or sth good. Though it appears to me a funeral flower so I usually sell them out immediately.

 

[marea]

I dont know their intended use, but i recall seeing a post that translated what is on the sign.

 

[stitchmaker]

Flashy Flower Sign was available in ACNL. Japan got it first. It was a downloadable item for NA Sept 10 to Oct 2015.

Downloadable Content

This article is about the items distributed in New Leaf. For the items distributed in City Folk, see Distributed Items. Downloadable content (better known as DLC) in New Leaf describes items distributed by Nintendo's specialized item servers. New Leaf takes advantage of distributed items that...

animalcrossing.fandom.com

I live in Canada and think I was able to order it from a Japan town that I streetpass.
Just checked my ACNL town and you can reorder it.

Got 2 Flashy Flower Sign from balloons in ACNH.

 

[Ras]

Don't know about other AC games, but a different colored one is in Pocket Camp.