Yes the Zen circle thingy ties in to Aikido. Aikido is a (some say useless) martial art which emphasizes using an attacker's motion against him, and philosophi

Yes the Zen circle thingy ties in to Aikido. Aikido is a (some say useless) martial art which emphasizes using an attacker's motion against him, and philosophically contains many philosophies which it shares with Zen Buddhism.