The link to the article you posted expired, but I did find another article at the Nippon Ham Fighters website.
I won’t translate the article word-for-word, but here are the basic details.
A number of players from West Africa are visiting Japan under something called the West Africa Baseball Project. As part of that project, a team of Nippon Ham Fighter old timers played an exhibition game against the team from West Africa on July 17 at Muroran Shin Nittetsu Sumikin Stadium in Hokkaido. Over 2,000 people attended the game. The Nippon Ham Fighter old timers beat West Africa 10-2.
There is also a Japanese site about the West Africa Baseball Project. The team is playing a number of exhibition games in Japan between June 27 and August 2. The site also has a list of players on the West Africa team.
Ouedoraogo Nombanba Moussa
Bonkoungou Aboubaker Kader
Sanou Farice Ussene
Sanfo Lassina *play for an Independent League team in for Kochi
Mwssanh Yao Raphael
Konkpe Gogoua Juste
Henry Kotei Nikoi
I just copied and pasted the names from the site, so any spelling mistakes are not mine.