[3] In May 2019, Hoshino lost in a playoff for the Kansai Open Golf Championship before winning his second Japan Golf Tour event at the Dunlop Srixon Fukushima Open in June, a tournament reduced to 54 holes.

A third-place finish in the Japan PGA Championship the following week lifted him into the top-100 of the Official World Golf Ranking.

[citation needed] Hoshino won the Fujisankei Classic for the second time in 2020, beating Mikumu Horikawa at the third hole of a sudden-death playoff.

[4] In February 2024, Hoshino claimed his first victory on the European Tour at the Commercial Bank Qatar Masters.

[5] European Tour playoff record (0–1) *Note: The 2019 Dunlop Srixon Fukushima Open was shortened to 54 holes due to weather.