Domo arigato.  I knew that some difference had to exist, but I was unsure
whether it was one of timing (e.g., when the knees hit the mat) or of
kazushi.

I should have looked at http://www.kodokan.org/e_waza/seoiotoshi.html before
I asked the question.  It contains the answer:

"These two techniques are alike, especially in the lifting position.
However, the difference is in the throwing concept.
"Seoi-nage : lift up the opponent and throw
"Seoi-otoshi : pull down and throw (at this time, one knee or both knees
must touch on the mat)

"Although the knee or knees touch the mat at one time during the process of
the throw, if at the actual execution of the throw, the knee or knees are
not touching, the throw is considered to be Seoi-nage.

"It is very difficult to define these techniques in the split second of
execution. It is necessary to segregate these techniques."

Onegai Shimasu, when you say "suddenly change the movement of kuzushi as if
we cut the air with our  hands" are you referring to the change in uke's
direction from forward (and perhaps upward) to suddenly downard?


"Jigotai" <jigo@ono.com> wrote in message
news:b05q1n$lsnm3$1@ID-113466.news.dfncis.de...
>
> "R Hunziker" <rmhunziker@hotmail.com> escribi