Sakai's Happiness is a humorous and bittersweet portrayal of an ordinary family dealing with the challenges of everyday life.
| Actor | Role |
|---|---|
| NNaoyuki MoritaTsuguo Sakai | Tsuguo Sakai |
 Yusuke SantamariaMasakazu Sakai | Masakazu Sakai |
 TomochikaTerumi Sakai | Terumi Sakai |
 Nanami NabemotoHikaru Sakai | Hikaru Sakai |
 Mitsuki TanimuraAki | Aki |
 Hidekazu AkaiNot listed | Not listed |
 Yoriko DoguchiNot listed | Not listed |
 Mari HamadaNot listed | Not listed |
 Manami HonjoNot listed | Not listed |
 Masaki MiuraNot listed | Not listed |
| HHiroya MoritaNot listed | Not listed |
 Masato YamadaNot listed | Not listed |
 Noboru TakachiNot listed | Not listed |