Here are more favorites from the Sogetsu exhibition "Believing in the Power of Flowers". The first three arrangements are all by iemoto Akane Teshigahara.
The next one is a pine arrangement in an enormous ceramic vase by the 3rd iemoto Hiroshi Teshigahara. I didn't get who made this ikebana for the exhibition, but it was created to honor Hiroshis efforts as iemoto.
This last arrangement is by master teacher Tetsunori Kawana. If you take a closer look at it you may notice that it has been put together by different parts of a pine tree in a quite advanced way. I especially like the way he's been using resin to glue dry twigs into an artistic shape balancing the fresh green part of the branch.