

In Ryōi Shintō-ryū (良移心当流) we speak about 'Go maai' (五間合 - 5 distances). The first of these is the range of projectiles and this is the subject of another excellent book by Eric Shahan entitled 'An Illustrated Guide Shuriken' which is a translation of :
'Zukai Shurikenjutsu' 図解 手裏剣術 (in Japanese) by Fujita Seiko (藤田西湖) 1964.
This book covers:
投擲 武術 Tōteki Bujutsu (throwing strike martial arts)
石擲術 Tsubute-jutsu (stone hitting art)
投槍 Toso (throwing spear)
打根 Uchine (throwing arrow)
手裏剣術 Shuriken-jutsu (hidden hand blade)