- Country: Japan
- Genres: N/A
- Release: 1968-01-27
- Director: Norifumi Suzuki
- Writers: Ryûnosuke Ono , Susumu Saji , Fûtarô Yamada
- Language: Japanese
- Stars: Isao Natsuyagi , Yukiko Kuwahara , Hiroko Sakuramachi , Hiroko Sakuramachi , Minoru Oki , Tatsuo Endō , Daisuke Awaji , Kogiku Hanayagi , Masao Hori , Mitsukazu Kawamura , Harumi Kiritachi
- Runtime: 89 min
- Awards: N/A
- AKA: 忍びの卍 (Japan) , The Secret of the Fylfot , The Secret of the Fylfot (United Kingdom) , The Secret of the Fylfot (United States of America) , Shinobi no manji , Ninja's Mark (Japan)
- Plot: The freelancing ninja Shiinusho Toma is assigned security at the Eno Castle. When he meets his match in the form of whip-wielding kunoichi femme-fatale Kageroi, a deadly romance blooms.
- IMDB:tt0200131
The Secret of the Fylfot Cast · · · ALL
Norifumi Suzuki
Director
Isao Natsuyagi
Shiinoha Toma
Hiroko Sakuramachi
Rinichi Yamamoto
Ikada Oriemon
Tatsuo Endō
Mushikago Ujin
Kenji Ushio
Dodo Senjuro
Kantarô Suga
Iemitsu
Hōsei Komatsu
Shingo Yamashiro
Tadanaga
Yuriko Mishima
Yukiko Kuwahara
Kinuta
Harumi Kiritachi
Tomoko Mayama
Obumi
Annu Mari
Osai
Akemi Mari
Oso
Meichô Soganoya
Doi Ooinokami
Kogiku Hanayagi
Lady Kasuga
Minoru Oki
Mariko Ogawa
Okuru
Masao Hori
Kinji Nakamura
Hitoshi Ômae
Masaru Shiga
Daisuke Awaji