Answer ~ Keishichô Kenshô Sôsakan (2012) featured a cast of 9 tracked actors. Of these, 9 (100%) are still alive today. The oldest surviving cast member is Ryosei Tayama, age 75. This TV series starred Arisa Mizuki and Seiichi Tanabe.
100% still with us· verified cast
Survivorship
Cast Reunion Index: 100% still living
Cast9 members
| Person | Character | Status | DOB | Age | DOD | Age in 2012 |
|---|---|---|---|---|---|---|
 Arisa Mizuki Akira Shinkai | Akira Shinkai | Living | 05/12/1976 | 49 | — | 36 |
 Seiichi Tanabe Shinichi Nagatomo | Shinichi Nagatomo | Living | 03/04/1969 | 57 | — | 43 |
 Kenichi Endo Yusuke Higashide | Yusuke Higashide | Living | 28/06/1961 | 65 | — | 51 |
 Shunji Igarashi Yoshinobu Hasebe | Yoshinobu Hasebe | Living | 07/08/1986 | 40 | — | 26 |
 Naomi Nishida Hitomi Tachibana | Hitomi Tachibana | Living | 16/02/1972 | 54 | — | 40 |
 Ryosei Tayama Tsuguo Takemura | Tsuguo Takemura | Living | 09/08/1951 | 75 | — | 61 |
 Yutaka Matsushige Shozo Usui | Shozo Usui | Living | 19/01/1963 | 63 | — | 49 |
 Tsurutaro Kataoka Shigeo Kogure | Shigeo Kogure | Living | 21/12/1954 | 71 | — | 58 |
 Hidekazu Mashima Isamu Yukimura | Isamu Yukimura | Living | 13/11/1976 | 49 | — | 36 |