I Shall Not Forget

Wasureru Monoka 忘れるものか

Director: Akinori Matsuo
Released: December 28, 1968
Distributor: Nikkatsu
Screenplay: Ei Ogawa 小川英 and Michio Sobu 蘇武路男

Starring:
Meiko Kaji 梶芽衣子 (Masako Ota 太田雅子) as Kaoru
Yujiro Ishihara 石原裕次郎 as Shiro Okabe
Hideaki Nitani 二谷英明 as Yosuke Tsumura
Yuriko Hoshi 星由里子 as Yuko Tsumura
Ryunosuke Kaneda 金田竜之助 as Kamozawa
Michio Hino 日野道夫 as Ono
Tamagawa Isao 玉川伊佐男 as Deka Nanbunaga
Hiroshi Kawaguchi 川口恒 as Ken
Etsuko Ichihara 市原悦子 as Rumi
Chiaki Michiru 千秋みつる as Shino
Jun Tazaki 田崎潤 as Ogata

Info:

Also known as Man From Yesterday.

You can hear Yujiro Ishihara's theme song for the movie on YouTube.

Plot:

Tsumura Yōsuke, the president of O.T. Shōji, a company in Kyoto, is killed by a bomb placed in his car. Okabe Shirō, Yōsuke's friend who established the company with him, hurries back to Kyoto, where he encounters Yōsuke's wife Yūko. Six years ago, Shirō and Yūko fell in love, but Yōko chose Yōsuke instead, and Shirō left Japan. Though Yōko asks him not to get involved, Shirō suspects that a yakuza leader named Ogata is behind the murder. Ogata has his men interfere with Shirō's investigations into Yōsuke's death. Nevertheless, Shirō learns that Yōsuke's company had been facing bankruptcy and that Yōsuke had gone into the smuggling business with Ogata. He also learns that Yōsuke used to visit a woman named Rumi, who is the proprietress of a bar. Rumi denies she had a relationship with Yōsuke but when Shirō tails her, he finds Yōsuke alive.

Thanks to WorldCat.org for the synopsis.