Well, JE is known for showcasing their Johnnys when they become adults (20).

All those who turn 20 within the year appear at the ceremony with a chosen senpai who is usually at least 30.

1999:
Nagase Tomoya (TOKIO)
Morita Go (V6)
Domoto Koichi (Kinki Kids)

2000:
Miyake Ken (V6)
Domoto Tsuyoshi (Kinki Kids)

2001:

Ohno Satoshi (Arashi)
Okada Junichi (V6)
Attending Senpai: Joshima Shigeru (TOKIO)

2002:
Sakurai Sho (Arashi)
Hideaki Takizawa (Takki & Tsubasa)
Imai Tsubasa (Takki & Tsubasa)
Attending Senpai: Sakamoto Masayuki (V6)

2003:

Aiba Masaki (Arashi)
Attending Senpai: Yamaguchi Tatsuya (TOKIO)

2004:
Ninomiya Kazunari (Arashi)
Matsumoto Jun (Arashi)
Attending Senpai: Nagano Hiroshi (V6)