It is no secret that Street Fighter 6 has really taken off in Japan and is one of the most popular games in the country. This is evidenced by the mammoth views each Street Fighter 6 stream gets with Street Fighter League averaging about 500,000 views per episode (on YouTube only).
But something else that has been happening is that players from other games in Japan are focusing on Street Fighter 6 as their game of choice.
The latest player to make the transition is King of Fighters player, Laggia. Laggia is a well-known name within the scene and was even the SNK World Championship winner defeating Evo Winner Xiao Hai and fellow countryman, M, to seal the victory. But then he disappeared for a bit and it was later revealed that he has been grinding Street Fighter 6 and was the winner of the Nagoya Oja License Challenge Tour Round 1. This is a tournament that promotes fighting games in Japan and the top 2 are recommended for JeSU licenses.
JeSU is the Japanese Esports Union which is the governing body for esports in the country. Any player with a license becomes a recognized pro player and is able to be picked up by teams, sponsors and so on.