Hitchhiker (stylized in all caps) is an extended play (EP) marketed as the eighth single of Japanese boy band JO1. It also served as the lead single for their first greatest hits album, Be Classic (2025). The EP single includes six songs and was released by Lapone Entertainment in four editions on May 29, 2024, with the Japan Record Excellent Work Award winner "Love Seeker" serving as the lead track.
Hitchiker debuted at number one on Oricon Daily Singles Chart with 415,697 copies sold. The EP single became the group's eight consecutive number-one on the weekly chart with 505,623 copies sold; it was also the fifth single in 2024 that exceeded half a million sales in its first week. Hitchiker also topped the Billboard Japan Top Singles Sales chart with 738,775 copies sold. The EP single marks the group's first Triple Platinum certification by the Recording Industry Association of Japan for more than 750,000 copies in shipments.
"Love Seeker", "Test Drive" are common tracks 1 and 2 for all editions.