Secrets of Ittō-ryū (Jp. Ittō-ryū Gokui) by Sasamori Junzō (Mark Hague trans.).
The definitive work on the school in the English language. Volumes Two, Three and Five forthcoming.
Principles of Budo: Ono-ha Ittō-ryū
Ono-ha Ittō-ryū: One sword to rule them all
Ono-ha Ittō-ryū’s “kiriotoshi”: An “invincible” technique