MGM released Toei's Shōnen Sarutobi Sasuke as Magic Boy in 1961, making it the first ninja anime to hit domestically. So, there's a good argument to be made that it's the most important pre-Naruto North American ninja release. You'd also probably get a lot of arguments for Ninja Scroll to take the top spot, so it's appropriate that the Japanese Blu-ray release is going to include the English dub.
Jūbēi Ninpūchō, aka Wind Pledged Samurai Beast, aka Ninja Scroll will be released on Japanese Blu-ray by Victor Entertainment and Flying Dog on May 23rd for 8,190yen ($98). Bonus features include a commentary track by director Yoshiaki Kawajiri and character designer Yutaka Minowa .
To promote the release, the movie will be screened at Cine Libre Ikebukuro April 14th-20, with a Kawajiri talk planned on the 14th.