CHICAGO — Big fights are like pregnancies, the anticipation is more fun than the actual delivery, which can be dull and complicated.

Take the case of Floyd Mayweather’s announced un-retirement last Saturday on the heels of the GGG-Alvarez rematch.

The flamboyant, undefeated fist-thrower jolted the sports world with his desire to give Manny Pacquiao a rematch sometime this December.

Nothing is set in stone yet. No details about weight, venue, etc.  But the rumors are flying fast, like Mayweather’s counter punches.

If necessity is the mother of invention, hype must be the son of promotion.

Mayweather, according to SPIN.ph, will visit Manila, Philippines sometime next week.

Although the report said the pride of Grand Rapids, Michigan will be in town only to iron out some endorsement deals, he can always find time to secretly meet with Pacquiao.

Do the math. Manny plus Money equals a blockbuster deal.

So where will the fight be staged, Macau, Malaysia, Dubai, London, or perhaps, Mayweather’s backyard, Las Vegas?

You can add Japan to that list, says a source who asked to stay anonymous.

Tokyo does makes sense.

After all, it’s where Mayweather and Pacquiao had a chance encounter recently.

While known for ninjas and the martial arts discipline called karate, which means empty hand, Japan famously hosted the Mike Tyson-Buster Douglas heavyweight championship fight last February 11, 1990.

Japan is also home to Teiken Boxing Gym, one of the world’s most renowned stables which managed great champions such as the late Edwin Valero, Jorge Linares, and most notably, Roman “Chocolatito” Gonzalez.

Teiken’s head, promoter Akihiko Honda, is a man of immense wealth and experience, who can bring a fight of this magnitude to the land of the Rising Sun.

In the end, only Mayweather and Pacquiao knows whether the Japan fight rumor is Yokoso or a Sayonara.