Masaaki Hatsumi Kukishin ryu Bojutsu - Gokui Gata - Ichimonji 

Must be a hell of a pool player

Jutte, Kusarigama, Hojojutsu E-de miru jidai kosho hyakka by Nawa Yumio www.ebay.com/itm/313037760379 SOJUTSU (Yari) by Masaaki Hatsumi Rare book, Kukishin Ryu, Ninja & Translation www.ebay.com/itm/313037689184 BOJUTSU - Art of the 6ft staff by Masaaki Hatsumi Rare book, Kukishin Ryu www.ebay.com/itm/313037481714 Yagyu Shingan Ryu Heijutsu by Jun Osano www.ebay.com/itm/313038596017 Ninjutsu - History Ninja by Okuse Heishichiro Ninjutsu sono rekishi www.ebay.com/itm/313038597517

Sekiro

The two guys at the beginning are no good, but the student with the white hair seems talented. If he trains for ten years or so, he should achieve a good level despite his advanced age. Good luck!