Matryomin is the unique, original erectronic musical instrument invented
by Masami Takeuchi in 1999. It is a type of theremin - oldest electro-musical
instrument invented in Russia - shaped Russian traditional wooden doll,
Matrioshka.
It hold form of Matrioshka perfectly, moreover, performing five octaves
range. The distance of 1 octave at Low-Middle range is equal to Etherwavetheremin
of Moog Music Inc. If you have acquired the basic technique to play theremin
by Etherwavetheremin, you can enjoy playing Matryomin by same way. Matryomin
is only pitch controlled theremin.
Mandarin Electron, a company directed by Masami Takeuchi, started manufacturing Matryomin on a commercial basis in 2003. Now, Matryomin is going on 2nd generation model. Selled over 1,600 till now in Japan

Sample movies
Playing the Matryomin
Matryomin : Masami Takeuchi, Ukulele guitar : Akiyo Hamaguchi
(1'35" / 560KB / Windows Media / 2003)
Song
of Mable / composed by Suzuki Tadasuke
Matryomin ensemble "Mable"
(2'30" / 6.5MB / Windows Media / 2005)