Hi Igor,
you are right Tsuzuki-waza is just a new name. As I have understood it, Taigi is a bit madeup name that even in Japanesse does not ring so good..
(but I think the word is much more easy to say than the new one

)
on ki-aikido HQ homepage you can read the officiel words about it:
(
http://www.ki-society.or.jp/english/renew/aikidokai_001.html )
-----------------
Among the techniques of Shin Shin Toitsu Aikido, you'll find Hitori-waza (single-person technique), Kumi-waza (paired technique), and Tsuzuki-waza /Taigi (continuously executed technique).
*Hitori-waza: A solo individual performs these Aikido techniques. This practice helps you to learn to constantly maintain mind and body unification even through any intense movements.
*Kumi-waza: You perform these Aikido techniques with a partner. This practice helps you to learn correct technique from wrong and to learn to lead the mind of your partner with proper respect to his mind.
*Tsuzuki-waza: You engage in a series of techniques carried out consecutively, one after another. This practice helps you to learn to maintain mind and body unification consistently while continuously executing the series.
--------------
You can also read the article on our website
http://toitsu.dk under members-> articles (direct link:
http://toitsu.dk/articles/tsuzukiwaza.html )
Regarding the Examination, then most of the ki-aikido dojo in Europe are not affiliated with KNK HQ Japan anymore, so its not exactly the same test criteria anymore.
There are still a few dojo's in Europe that are together with Japan, but I have not found any
test criteria on there pages.
So the test criteria depends on wich dojo you are practicing in.
Sincerly
Michael