Age Debut of JE Groups
This is another useless thing I did.. After reading some discussion about the best age to debut in KPop land, I was curious about the debut age in JE land. So I did some calculation for those JE groups.
SMAP
Debut : Sept 1991
Nakai Masahiro (18th August 1972) = 19 y.o
Kimura Takuya (13th November 1972) = 19 y.o
Inagaki Goro (8th December 1973) = 18 y.o
Kusanagi Tsuyoshi (9th July 1974) = 17 y.o
Katori Shingo (31th January 1977) = 14 y.o
Age gap btw oldest and youngest = 5 years
Average age = 17.4
Tokio
Debut : Sept 1994
Joshima Shigeru (17th November 1970) = 24 y.o
Yamaguchi Tatsuya (10th January 1972) = 22 y.o
Kokubun Taichi (2nd September 1974) = 20 y.o
Matsuoka Masahiro (11th January 1977) = 17 y.o
Nagase Tomoya (7th November 1978) = 16 y.o
Age gap btw oldest and youngest = 8 years
Average age = 19.8
V6
Debut : Nov 1995
Sakamoto Masayuki (24th July 1971) = 24 y.o
Nagano Hiroshi (9th October 1972) = 23 y.o
Inohara Yoshihiko (17th May 1976) = 19 y.o
Go Morita (20th February 1979) = 16 y.o
Miyake Ken (2nd July 1979) = 16 y.o
Okada Junichi (18th November 1980) = 15 y.o
Age gap btw oldest and youngest = 9 years
Average age = 18.8
Kinki Kids
Debut : July 1997
Domoto Koichi (1st January 1979) = 18 y.o
Domoto Tsuyoshi (10th April 1979) = 18 y.o
Arashi
Debut : Sept 1999
Ohno Satoshi (26th November 1980) = 19 y.o
Sakurai Sho (25th January 1982) = 17 y.o
Aiba Masaki (24th December 1982) = 17 y.o
Ninomiya Kazunari (17th June 1983) = 16 y.o
Matsumoto Jun (30th August 1983) = 16 y.o
Age gap btw oldest and youngest = 3 years
Average age = 17
Tackey and Tsubasa
Debut : Sept 2002
Takizawa Hideaki (29th March 1982) = 20 y.o
Imai Tsubasa (17th October 1981) = 21 y.o
News
Debut : Sept 2003
Koyama Keiichiro (1st May 1984) = 19 y.o
Masuda Takahisa (4th July 1986) = 17 y.o
Kato Shigeaki (11th July 1987) = 16 y.o
Tegoshi Yuya (11th November 1987) = 16 y.o
Age gap btw oldest and youngest = 3 years
Average age = 17
Kanjani8
Debut : Aug 2004
Yokoyama Yu (9th May 1981) = 23 y.o
Shibutani Subaru (22nd December 1981) = 23 y.o
Murakami Shingo (26th January 1982) = 22 y.o
Maruyama Ryuhei (26th November 1983) = 21 y.o
Yasuda Shota (11th September 1984) = 20 y.o
Nishikido Ryo (3rd November 1984) = 20 y.o
Ohkura Tadayoshi (16th May 1985) = 19 y.o
Age gap btw oldest and youngest = 4 years
Average age = 21.14
KAT-TUN
Debut : Mar 2006
Nakamaru Yuichi (4th September 1983) = 23 y.o
Ueda Tatsuya (4th October 1983) = 23 y.o
Kamenashi Kazuya (23rd February 1986) = 20 y.o
Age gap btw oldest and youngest = 3 years
Average age = 22
Hey! Say! Jump
Debut : Nov 2007
Yabu Kota (31st January 1990) = 17 y.o
Takaki Yuya (26th March 1990) = 17 y.o
Inoo Kei (22nd June 1990) = 17 y.o
Yaotome Hikaru (2nd December 1990) = 17 y.o
Arioka Daiki (15th April 1991) = 16 y.o
Okamoto Keito (1st April 1993) = 14 y.o
Yamada Ryosuke (9th May 1993) = 14 y.o
Nakajima Yuto (10th August 1993) = 14 y.o
Chinen Yuuri (30th November 1993) = 14 y.o
Age gap btw oldest and youngest = 3 years
Average age = 15.5
Kis-My-Ft2
Debut : Aug 2011
Kitayama Hiromitsu (17th September 1985) = 26 y.o
Yokoo Wataru (16th May 1986) = 25 y.o
Fujigaya Taisuke (25th June 1987) = 24 y.o
Miyata Toshiya (14th September 1988) = 23 y.o
Tamamori Yuta (17th March 1990) = 21 y.o
Nikaido Takashi (6th August 1990) = 21 y.o
Senga Kento (23rd March 1991) = 20 y.o
Age gap btw oldest and youngest = 6 years
Average age = 22.86
Sexy Zone
Debut : Sept 2011
Nakajima Kento (13th March 1994) = 17 y.o
Kikuchi Fuma (7th March 1995) = 16 y.o
Sato Shori (30th October 1996) = 15 y.o
Matsushima So (27th November 1997) = 14 y.o
Marius Yo (30th March 2000) = 11 y.o
Age gap btw oldest and youngest = 6 years
Average age = 14.6
A.B.C-Z
Debut : Feb 2012
Goseki Koichi (17th June 1985) = 27 y.o
Totsuka Shota (13th November 1986) = 26 y.o
Tsukada Ryoichi (10th December 1986) = 26 y.o
Kawai Fumito (20th October 1987) = 25 y.o
Hashimoto Ryosuke (15th July 1993) = 19 y.o
Age gap btw oldest and youngest = 8 years
Average age = 24.6
Johnny's West
Debut : April 2014
Nakama Junta (21st October 1987) = 27 y.o
Hamada Takahiro (19th December 1988) = 26 y.o
Kiriyama Akito (31st August 1989) = 25 y.o
Shigeoka Daiki (26th August 1992) = 22 y.o
Kamiyama Tomohiro (1st July 1993) = 21 y.o
Fujii Ryusei (18th August 1993) = 21 y.o
Kotaki Nozomu (30th July 1996) = 18 y.o
Age gap btw oldest and youngest = 9 years
Average age = 22.86
King and Prince
Debut: Mei 2018
Kishi Yuta (29 September 1995) = 22 y.o
Iwahashi Genki (17 December 1996) = 21 y.o
Hirano Sho (29 January 1997) = 21 y.o
Jinguji Yuya (30 October 1997) = 20 y.o
Nagase Ren (23 January 1999) = 19 y.o
Takahashi Kaito (3 April 1999) = 19 y.o
Age gap btw oldest and youngest = 3 years
Average age = 20.33
The oldest idols to debut are Goseki Koichi (A.B.C-Z) and Nakama Junta (Johnny's West) at 27 years old, and the youngest one is Marius Yo (Sexy Zone) at 11 years old.
The youngest group is Sexy Zone and then HSJ eventhough they debuted earlier than Kisumai, ABCZ and Johnny's West. And they debuted in such younger age, their average debut ages was 14 and 15.
The biggest different age between oldest and youngest are 9 years which are Sakamoto - Okada (V6) and Nakama - Kotaki (Johnny's West).
SMAP
Debut : Sept 1991
Nakai Masahiro (18th August 1972) = 19 y.o
Kimura Takuya (13th November 1972) = 19 y.o
Inagaki Goro (8th December 1973) = 18 y.o
Kusanagi Tsuyoshi (9th July 1974) = 17 y.o
Katori Shingo (31th January 1977) = 14 y.o
Age gap btw oldest and youngest = 5 years
Average age = 17.4
Tokio
Debut : Sept 1994
Joshima Shigeru (17th November 1970) = 24 y.o
Yamaguchi Tatsuya (10th January 1972) = 22 y.o
Kokubun Taichi (2nd September 1974) = 20 y.o
Matsuoka Masahiro (11th January 1977) = 17 y.o
Nagase Tomoya (7th November 1978) = 16 y.o
Age gap btw oldest and youngest = 8 years
Average age = 19.8
V6
Debut : Nov 1995
Sakamoto Masayuki (24th July 1971) = 24 y.o
Nagano Hiroshi (9th October 1972) = 23 y.o
Inohara Yoshihiko (17th May 1976) = 19 y.o
Go Morita (20th February 1979) = 16 y.o
Miyake Ken (2nd July 1979) = 16 y.o
Okada Junichi (18th November 1980) = 15 y.o
Age gap btw oldest and youngest = 9 years
Average age = 18.8
Kinki Kids
Debut : July 1997
Domoto Koichi (1st January 1979) = 18 y.o
Domoto Tsuyoshi (10th April 1979) = 18 y.o
Arashi
Debut : Sept 1999
Ohno Satoshi (26th November 1980) = 19 y.o
Sakurai Sho (25th January 1982) = 17 y.o
Aiba Masaki (24th December 1982) = 17 y.o
Ninomiya Kazunari (17th June 1983) = 16 y.o
Matsumoto Jun (30th August 1983) = 16 y.o
Age gap btw oldest and youngest = 3 years
Average age = 17
Tackey and Tsubasa
Debut : Sept 2002
Takizawa Hideaki (29th March 1982) = 20 y.o
Imai Tsubasa (17th October 1981) = 21 y.o
News
Debut : Sept 2003
Koyama Keiichiro (1st May 1984) = 19 y.o
Masuda Takahisa (4th July 1986) = 17 y.o
Kato Shigeaki (11th July 1987) = 16 y.o
Tegoshi Yuya (11th November 1987) = 16 y.o
Age gap btw oldest and youngest = 3 years
Average age = 17
Kanjani8
Debut : Aug 2004
Yokoyama Yu (9th May 1981) = 23 y.o
Shibutani Subaru (22nd December 1981) = 23 y.o
Murakami Shingo (26th January 1982) = 22 y.o
Maruyama Ryuhei (26th November 1983) = 21 y.o
Yasuda Shota (11th September 1984) = 20 y.o
Nishikido Ryo (3rd November 1984) = 20 y.o
Ohkura Tadayoshi (16th May 1985) = 19 y.o
Age gap btw oldest and youngest = 4 years
Average age = 21.14
KAT-TUN
Debut : Mar 2006
Nakamaru Yuichi (4th September 1983) = 23 y.o
Ueda Tatsuya (4th October 1983) = 23 y.o
Kamenashi Kazuya (23rd February 1986) = 20 y.o
Age gap btw oldest and youngest = 3 years
Average age = 22
Hey! Say! Jump
Debut : Nov 2007
Yabu Kota (31st January 1990) = 17 y.o
Takaki Yuya (26th March 1990) = 17 y.o
Inoo Kei (22nd June 1990) = 17 y.o
Yaotome Hikaru (2nd December 1990) = 17 y.o
Arioka Daiki (15th April 1991) = 16 y.o
Okamoto Keito (1st April 1993) = 14 y.o
Yamada Ryosuke (9th May 1993) = 14 y.o
Nakajima Yuto (10th August 1993) = 14 y.o
Chinen Yuuri (30th November 1993) = 14 y.o
Age gap btw oldest and youngest = 3 years
Average age = 15.5
Kis-My-Ft2
Debut : Aug 2011
Kitayama Hiromitsu (17th September 1985) = 26 y.o
Yokoo Wataru (16th May 1986) = 25 y.o
Fujigaya Taisuke (25th June 1987) = 24 y.o
Miyata Toshiya (14th September 1988) = 23 y.o
Tamamori Yuta (17th March 1990) = 21 y.o
Nikaido Takashi (6th August 1990) = 21 y.o
Senga Kento (23rd March 1991) = 20 y.o
Age gap btw oldest and youngest = 6 years
Average age = 22.86
Sexy Zone
Debut : Sept 2011
Nakajima Kento (13th March 1994) = 17 y.o
Kikuchi Fuma (7th March 1995) = 16 y.o
Sato Shori (30th October 1996) = 15 y.o
Matsushima So (27th November 1997) = 14 y.o
Marius Yo (30th March 2000) = 11 y.o
Age gap btw oldest and youngest = 6 years
Average age = 14.6
A.B.C-Z
Debut : Feb 2012
Goseki Koichi (17th June 1985) = 27 y.o
Totsuka Shota (13th November 1986) = 26 y.o
Tsukada Ryoichi (10th December 1986) = 26 y.o
Kawai Fumito (20th October 1987) = 25 y.o
Hashimoto Ryosuke (15th July 1993) = 19 y.o
Age gap btw oldest and youngest = 8 years
Average age = 24.6
Johnny's West
Debut : April 2014
Nakama Junta (21st October 1987) = 27 y.o
Hamada Takahiro (19th December 1988) = 26 y.o
Kiriyama Akito (31st August 1989) = 25 y.o
Shigeoka Daiki (26th August 1992) = 22 y.o
Kamiyama Tomohiro (1st July 1993) = 21 y.o
Fujii Ryusei (18th August 1993) = 21 y.o
Kotaki Nozomu (30th July 1996) = 18 y.o
Age gap btw oldest and youngest = 9 years
Average age = 22.86
King and Prince
Debut: Mei 2018
Kishi Yuta (29 September 1995) = 22 y.o
Iwahashi Genki (17 December 1996) = 21 y.o
Hirano Sho (29 January 1997) = 21 y.o
Jinguji Yuya (30 October 1997) = 20 y.o
Nagase Ren (23 January 1999) = 19 y.o
Takahashi Kaito (3 April 1999) = 19 y.o
Age gap btw oldest and youngest = 3 years
Average age = 20.33
The oldest idols to debut are Goseki Koichi (A.B.C-Z) and Nakama Junta (Johnny's West) at 27 years old, and the youngest one is Marius Yo (Sexy Zone) at 11 years old.
The youngest group is Sexy Zone and then HSJ eventhough they debuted earlier than Kisumai, ABCZ and Johnny's West. And they debuted in such younger age, their average debut ages was 14 and 15.
The biggest different age between oldest and youngest are 9 years which are Sakamoto - Okada (V6) and Nakama - Kotaki (Johnny's West).