- Japanese: ジャムおじさん
- Gender: Male
- Birthplace: Japan
- Birthdate: September 3rd
- Hobbies: Beautiful girls... hey, what are you talking about?!
- Likes: Eel pie
- Dislikes: Takoyaki
- First Appearance: pop'n music
UNCLE Jam was first introduced not in the pop'n music series, but rather in the beatmania song jam jam reggae, although he would not be named until his pop'n music debut, YOUNG DREAM. Although he does not frequently appear as a rival character in the pop'n music series, UNCLE Jam's animations have been used for several Ojamas.
pop'n music 2
- Smile The Night Away - disguised as KRAFT?.
pop'n music 5
- In a Grow - cameo in OLIVIA's JAM and FEVER WIN animations.
pop'n music 6
- ポップン音頭 - cameo in Pop'n All? Stars' idle animation.
pop'n music 10
pop'n music 12 いろは
- Into The Light - cameo in AYA's LOSE animation.
- Pop'n Xmas 2004 ～電子ノウタゴエ～ - cameo in the movie, same as in Pop'n Xmas 2004 ～天使ノウタゴエ～.
pop'n music 13 カーニバル
pop'n music Sunny Park
- 不思議の国のキングダム彼氏 - cameo in ARISA's MISS and LOSE animations.
ee'MALL 2nd avenue
- Pinky Nick - recycled from SUMMER TIME during location tests, 2P. Replaced in the final release by KRAFT?, and then by NICKEY in pop'n music 15 ADVENTURE.
- UNCLE Jam's name was originally capitalized as UNCLE JAM during development of the original pop'n music.
- UNCLE Jam has also appeared in the movies for BOA BOA LADY, BOA BOA LADY (JAMMING-MIX), five fathoms (beatmania II special version), It's your funky life!, jam jam reggae (Funky jam Cookie mix), jam jam reggae ～JAM JAM MIX～, and Queen's Jamaica.
- According to dj nagureo, UNCLE Jam's girlfriend is named BOA . She appears in BOA BOA LADY (JAMMING-MIX)'s video.
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