George Kusunoki Miller (ジョージ・楠木・ミラー, Jōji Kusunoki Mirā, born 16 September 1993), known professionally as Joji and formerly as Filthy Frank and Pink Guy, is a Japanese singer-songwriter, rapper, and record producer. Miller's music has been described as a mix between R&B, lo-fi, and trip hop.

Miller created The Filthy Frank Show on YouTube in 2011 while he was still living in Japan, gaining recognition for playing oddball characters on the comedy channels TVFilthyFrank, TooDamnFilthy, and DizastaMusic. Miller kept producing Filthy Frank videos after he traveled to the United States to attend college in 2012. The channels which featured comedy hip hop, rants, extreme challenges, and ukulele and dance performances, are noted for their shock humor and prolific virality. Miller's videos helped popularise the Harlem Shake, which contributed to the commercial success of Baauer's song of the same name which led to the production of memes and collaborations with YouTubers. As Pink Guy, Miller released two comedy studio albums, Pink Guy and Pink Season, as well as an extended play, between 2014 and 2017.

In late 2017, Miller ended The Filthy Frank Show to pursue a music career under the japanese version of his first name Joji. His debut album, Ballads 1, was released in 2018 and featured the single "Slow Dancing in the Dark". His second album, Nectar (2020), contained the singles "Sanctuary" and "Run". In 2022, he released the US Billboard Hot 100 top-ten single "Glimpse of Us", his highest-charting song, which was later featured on his third album, Smithereens (2022).