The poster tells a piece of aikido history
Tomita-Sensei performs a technique with Ulf Evenås, sensei for Göteborgs Aikidoklubb, as uke. The small picture in the upper right corner shows when Saito-sensei does the calligraphy on the lower part of the poster it self. Zeth Moberg took the photo, which the poster is based on, here in Gothenburg.