ONE Championship is plenty successful already, but in a couple months it will take its global profile even higher.

The Asia-based promotion recently signed former UFC champions Demetrious Johnson and Eddie Alvarez, as well as up-and-comer Sage Northcutt. And Monday, Johnson and Alvarez were in Tokyo to help usher in their new careers in ONE Championship.

Former flyweight kingpin Johnson and former Bellator and UFC lightweight champ Alvarez, along with ONE Championship atomweight titleholder Angela Lee, took part in a meet-and-greet with fans and ran MMA seminars in Tokyo, which is where Johnson and Alvarez will make their promotional debuts at ONE Championship: A New Era on March 31. On that same card, Lee fights strawweight champ Jing Nan Xiong to try to become a two-division titleholder.

Alvarez (29-6) meets Timofey Nastyukhin (11-3) in the lightweight grand prix. Johnson (27-3-1) meets Yuya Wakamatsu (10-2).

Check out some of the highlights from their seminars in the video above, as well as the photo gallery below.

Gallery Demetrious Johnson, Eddie Alvarez, Angela Lee host ONE Championship seminar view 10 images

For more on ONE Championship: A New Era, check out the MMA Rumors section of the site.