He has previously played in Major League Baseball (MLB) for the Texas Rangers and in NPB for the Hokkaido Nippon-Ham Fighters.

After the 2020 season, on November 26, 2020, the Fighters announced they were allowing Arihara to enter the posting system to play in Major League Baseball (MLB).

[7][8] On April 3, 2021, Arihara made his MLB debut as the starting pitcher against the Kansas City Royals, allowing 3 earned runs in 5.0 innings of work with 1 strikeout.

On May 22, 2021, it was revealed that Arihara had a posterior humeral circumflex artery aneurysm in his right shoulder, which required surgery, ruling him out for at least 12 weeks.

In a September 10 start against the Toronto Blue Jays, Arihara was clobbered for 11 earned runs on 12 hits and 5 walks in 3.0 innings pitched.

[14] On January 6, 2023, Arihara returned to Japan, signing a deal with the Fukuoka SoftBank Hawks of Nippon Professional Baseball (NPB).