- MATSUMOTO Bizen-no-kami Ki no Masamoto, Tengu sho no shidai (ca. 1500).
- ONO Seiemon Taira no Shigemasa, Kashima-Shinryû hyôhô mokuroku shidai (addressed to KUNII Taizen Minamoto no Ritsuzan; ca. 1780s).
- KUNII Zentarô, Bô tachiai no koto (ca. 1830-44).
- "Descendants of historically renowned swordsmen", The Asahi Picture News 12 February 1956, pp. 10-11
- KUNII Zen'ya, Kunii-ke sôden Kashima-Shinryû menkyo kaiden no maki (addressed to SEKI Humitake; 1964).
- KUNII Zen'ya, Kashima-Shinryû shihanke sôden ottegaki (addressed to SEKI Humitake; 1964).
- TÔ Minoru (Gûji, Kashima Jingû), Kashima Jingû (Tokyo: Gakuseisha, 1968); (includes information on the relationship between the Kashima Jingû and the Kashima-Shinryû).
- SEKI Humitake, Nihon budô no engen: Kashima-Shinryû (Tokyo: Kyôrin shoin, 1976).
- SEKI Humitake (1998): "Technique, physical strength and trance", Journal of Health, Physical Education and Recreation (Taiiku no kagaku, Nihon Taiiku Gakkai) 48(7), 535-537.
- Nipponia, "Nippon wa budô no kuni," (Gaimushô kôhôshi, 1999); (pp. 11-12 feature an introduction to the Kashima-Shinryû and the origins of Japanese martial art).
- SEKI Humitake (2001), Excepted from: "Plenary Lecture at the 34th Annual Meeting of Japanese Academy of Budô: Kashima-Shinryû and the Educational Principles of the Samurai Class," Budôgaku kenkyû 34, 6-7.
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Nihon budô no engen: Kashima-Shinryû,
an eleven volume series in VHS (NTSC) format, produced by Gaisei International of Japan; instruction and direction by SEKI Humitake
- Kenjutsu (3 vols.)
- Battôjutsu (2 vols.)
- Naginatajutsu
- Sôjutsu, Jôjutsu & Shurikenjutsu
- Jûjutsu (3 vols.)
- Bôjutsu
- SEKI Humitake (2013): "Ethics in the Traditional Martial Art of the Kashima Grand Shrine and in the Bible".
Eubios Journal of Asian and International Bioethics. 23(5), 158-160.
- CHRISTIANSON, G. Bjorn, VILENIUS, Mikko and SEKI Humitake (2018): "Role of the Sword Futsunomitama-no-tsurugi in the Origin of the Japanese Bushido Tradition", Asian Studies 6(2), 211-227.
- Humitake Seki, G. Bjorn Christionson, and Mikko Vilenius (2022): "Warrior Bravery". Eubios Journal of Asian and International Bioethics. 32(1), 2-3.