Most likely no, but he did say he wanted a major change for the series..
They are also removing the vid in a couple days...

This looks awesome. I wouldnt mind!

This needs to become real!

This actually looks good.

That is way too elaborate and time-consuming to just be a one-off April Fools prank.

It will almost for certain be in some form in Shin Yakuza, most likely as a mini-game sort of thing like the Majima construction stuff.

The over-the-top, and very well done cinematic animations that accompany the fight scenes in Yakuza fit perfectly in a turn based combat system. This looks great! Also the random, hot Japanese woman in the short skirt if my first ever waifu.

This could definitely be real.
It's not like the over the top humorous elements and effects are alien to the even the Yakuza mainline franchise.

And remember they did make a zombie shooter spinoff.

Too much effort to be an April Fool's joke.

I call real, and I love it! I wanted the game play to be different for the new Yakuza series than the previous ones too!

That would automatically make it the best Yakuza game ever! I hope it's not just a joke!

Awesome!