Romantic love story of Russian physician Gusev and Japanese woman Keiko takes place in time of fighting of Russian and Japanese scientists against poliomyelitis epidemic broken out in Japan in 1959.
| Actor | Role |
|---|---|
 Leonid FilatovGusev | Gusev |
 Komaki KuriharaKeiko | Keiko |
 Oleg TabakovTutunov | Tutunov |
 Elena YakovlevaTatyana | Tatyana |
| GGoh WatanabeKen | Ken |
| VVladimir IlinMedyaev | Medyaev |
 Andrey KharitonovIgor | Igor |
 Akira KumeMinister | Minister |
 Taketoshi NaitōDirector | Director |
| DDetlev KügowHorst | Horst |
 Vera TrofimovaValentina | Valentina |
| RRyochi OgasawaraTetsuo | Tetsuo |
 Masaki TerasomaKato | Kato |
| NNatalia IonovaNot listed | Not listed |
 Amangeldy TazhbayevNot listed | Not listed |
 Yuri PerovNot listed | Not listed |