Hatsumi Sensei recently shared with us a little book or scroll that describes using Metsubushi to conceal yourself or disappear in the mist (目潰霧隠れの豆本 metsubushi kirigakure no mamehon). It reads:
Throwing Metsubushi
(目潰投げ metsubushi nage)
目潰し投げは目的一点に投げる、数点に投げる等々、それに応じ、変化技を生かす。
四方投げは視方投げと書き、 ハ方投げは発鉋投げとく。
For the purpose of blinding target one spot, then target your throws in a few directions, throwing to several points, and respond using henka. When surrounded, toss and throw the metsubushi in four directions, then as you change keep throwing on this plane spreading the dust in eight directions.
1. 鼠逃遁甲の構といつて、 目潰投げの構。
start with the kamae of Santo Tonkō (this is like a fleeing mouse, and is part of our Togakure Ryu Ninjutsu study) and the kamae of metsubushi nage.
2. ただ目潰薬を投げればよいというものではない。
It is not sufficient just to throw the metsubushi powder
3. 色々の体変術によリ、目潰の術を的確にするのである。
By using taihenjutsu, you can be accurate with the art of targeting metsubushi.
4. 前後左右ハ方に、変化代変術と共に眼鼻口腔に打ち込む。
forwards, backwards, left, right, and in all directions around the circle, use this body changing art to strike into the eyes, nose, and mouth
Michael’s commentary: As always, it is really impossible to learn our art from books. Hopefully you have trained with a qualified instructor with 鼠逃遁甲の型 Santo Tonkō no Kata since it makes up some of the kihon of Ninjutsu! Also the taihenjutsu described here is very specific to this situation and must be specifically studied as well. You may see some of it in Soke’s videos, but there is nothing like learning in person.