ALL(H)OURS · RAPPER
Masami
Profile
| Stage name | Masami |
|---|---|
| Born | April 14, 2005 |
| Roles | Vocalist and performer |
| Group | ALL(H)OURS |
| Group debut | 2024 |
| Agency | See official profile |
The Japanese rapper’s height enters the room first, but his restrained delivery is what keeps the rap line from becoming a shouting contest.
Profile
| Birth name | Akiba Masami (秋葉正美) |
|---|---|
| Stage name | Masami |
| Born | April 14, 2005 |
| From | Osaka, Japan |
| Western zodiac | Aries · bold, independent and willing to step into the count first |
| Chinese zodiac | Wood Rooster · observant, polished and quietly exacting |
| Group | ALL(H)OURS |
| Role | Rapper |
| Group debut | January 10, 2024 with ALL OURS |
| Agency | EDEN Entertainment |
| Status | Current member · 2024–present |
Before ALL(H)OURS
Masami grew up in Osaka with an older sister and younger brother, then trained in South Korea for a Korean debut. He became ALL(H)OURS’ Japanese member and one of the taller bodies in its seven-person formations. The obvious profile shortcut is nationality plus height. The actual job is learning how to remain visible without disrupting the group picture.
Music, performance and work
Masami’s rap phrasing often sits more calmly against the production than Xayden or Hyunbin’s sharper attacks. That contrast gives songs room to breathe. As ALL(H)OURS moves through Korean promotions, Japanese schedules and international fan events, his Japanese and Korean fluency is useful, but translation duty is not a personality. The performance clips show confidence building across each era without relying on music-video editing to manufacture presence.
Training and debut context
Masami crossed both a language boundary and an industry boundary when he moved from Japan into the South Korean trainee system. ALL(H)OURS debuted under EDEN Entertainment on January 10, 2024, with the mini album ALL OURS and its title track “Gotcha.” The group’s name plays on the phrases “all ours” and “all hours,” framing seven members who intend to give their time and work fully to the audience.
The debut lineup paired Masami with Kunho, Youmin, Xayden, Minje, Hyunbin, and On:N. In that configuration he is not simply “the Japanese member.” His steadier rap color gives the team a tonal counterweight, while his height and long lines affect how choreographers balance formations around him.
Era map
2024, ALL OURS: “Gotcha” introduced the group through aggressive percussion, fast transitions, and performance-first staging. Masami’s early task was clarity: landing compact rap phrases while keeping the choreography’s momentum intact.
2024, WITNESS: “Shock” pushed the members toward a heavier, more confrontational performance language. Live stages made it easier to measure his improvement in projection and facial control beyond edited music-video cuts.
Later releases: As ALL(H)OURS expanded its catalog, Masami’s value remained in contrast. He does not need to imitate the brightest or most forceful member; the group works better when his lower-key delivery creates space between harder attacks.
Member profile scope
This page tracks Masami as a current ALL(H)OURS member. No verified formal solo music debut is attached to his name, so he belongs in the Member directory but not the Solo Artist directory. Individual photos, variety appearances, dance clips, or language duties do not by themselves create a separate artist discography.
The panda side quest
Masami likes black clothing, prefers the ocean to mountains, has three puppies and hates mushrooms. His representative emoji is a panda, which means he receives automatic side-quest citizenship in this house. The quieter offstage material is worth watching because it makes clear that restraint is a choice, not an absence.
Fandom notes and things the fact box misses
- Languages: Japanese and Korean.
- Representative emoji: panda. Correct answer.
- Nickname: Samsam.
- Formation value: tall is geography; timing is craft.
Official links and receipts
YouTube tracking history
Masami does not currently have a separately verified official solo-video catalog. ALL(H)OURS releases remain attached to the ALL(H)OURS group profile so group totals are not duplicated as individual activity.