This is the latest volume (2023 March edition) of a Japanese monthly football magazine Soccer King. Mitoma is "big enough" to be on its cover here in Japan.
And, this is the newest volume of another major Japanese monthly football magazine "Soccer Digest". This month has international match day week and there are Japan v Uruguay and Japan v Columbia, so the cover is Samurai Blue (Japanese national team). You see "Mitoma is the biggest" on its cover. You see the shirt number 11 guy next to Mitoma. He is Takefusa Kubo (21 years old), currently playing for a Spanish Club Real Sociedad (he used to play for the youth team of Real Madrid). I'd say Kubo and Mitoma are the most popular now.