In regards to there not being any kicks, Asai Sensei emphasised his kiho (health) karate by saying that "Kata like Seiryu are excellent practice, for those who have leg problems, and/or during times of recovery from knee, ankle and thy injuries".
The technical focus of Seiryu is the perfection of huri uchi (swinging strikes) with ganken (the rock fist), haito (the ridge hand), and naiwan (the inside forearm). The name of the kata 'Green Willow Tree' comes directly from these strikes, as they resemble the flexible branches of a willow tree.
In contrast, the solid Shotokan stances featured (zenkutsu dachi and kiba dachi) act like tree roots, providing steadfast stability, for the wild and flexible upper body actions. Asai Sensei often liked to compare his body suppleness, to that of a willow tree, and in particular, made reference to Seiryu kata.
In addition to the solid stances, there are also four neko ashi dachi utilized, each coordinated with gedan barai, for a quick defense, and more importantly, a coiled spring to rapidly counterattack. The final sequence sees a pivot action into heisoku dachi with ryo sokumen gedan barai (similar to Jion and Kakuyoku-nidan) followed by jodan teisho hasami uchi, and yori ashi, with chudan haito hasami uchi. The second and final kiai is applied on this last technique.