Nikkatsu Mainstream Releases 1971-1988
Contrary to a common belief, Nikkatsu did produce a few dozen mainstream movies during their Roman Porno era. These included comedies, youth dramas, action films etc. Compared to the 1100 or so Roman Porno films released during this period, the number is of course very small.
Here's a list of films I can think of. It may very well be incomplete. I've excluded movies where Nikkatsu participated in production but would not be considered the main producer (e.g. Kadokawa's Proof of a Man or ATG's Distant Thunder). Big thanks to 'Maito Guy' at
Rock Shock Pop for helping out with the list.
Men And War Pt. 3 (Sensou to ningen dai san bu) (1973) (Satsuo Yamamoto)
The Sun Falls And Rises Again (Hi wa shizumu hi wa noboru) (1973) (Koreyoshi Kurahara)
Portrait of a Flame (Honoo no shouzou) (1974) (Toshiya Fujita and Akira Kato)
The Red Lantern (Akachouchin) (1974) (Toshiya Fujita)
Sukeban Deka: Dirty Mary (Sukeban deka: daati Marii) (1974) (Yasuharu Hasebe)
Black Panther Bitch M (Kuroi mehyou emu) (1974) (Koretsugu Kurahara)
Younger Sister (Imouto) (1974) (Toshiya Fujita)
The Four Roughnecks (Abayo dachikou) (1974) (Yukihiro Sawada)
Virgin Blues (Baajin buruuzu) (1974) (Toshiya Fujita)
Cape Erimo (Erimomisaki) (1975) (Akira Kato)
Sachiko's Happiness (Sachiko no kou) (1976) (Kazunari Takeda)
Evening Primrose (Yoimachigusa) (1976) (Tatsumi Kumashiro)
Ah! That Pep Squad (Aa!! Hana no ouendan) (1976) (Chusei Sone)
Ah! That Pep Squad 2 (Aa!! Hana no ouendan 2) (1976) (Chusei Sone)
Ah! That Pep Squad 3 (Aa!! Hana no ouendan 3) (1977) (Chusei Sone)
The Baseball-Fan's Song (Yakyuukyou no uta) (1977) (Akira Kato)
Panic in High School (Koukou dai-panikku) (1978) (Sogo Ishii, Yukihiro Sawada)
Past Days Won't Return (Kaerazaru hibi) (1978) (Toshiya Fujita)
Eighteen Years of Age, to the Sea (Juuhassai, umi e) (1979) (Toshiya Fujita)
Super Gun Lady: Police Branch 82 (Sûpâ gun redei Wani Bunsho) (1979) (Chusei Sone)
I'm All Yours (Minna agechau) (1985) (Shusuke Kaneko)
The Half Moon (Itoshino Half Moon) (1987) (Yojiro Takita)
+
So Soft, So Cunning (1978) (Toshiya Fujita) [this seems to have been a Roman Porno release, but Nikkatsu is nowadays treating it as mainstream movie]