Jasuto is very flexible in terms of synthesis techniques. You can achieve additive, subtractive, FM/PM/AM and even hard-sync synthesis all pretty easily.
Both the synth and all the parameters are in one object called a scene.
A scene is made up of nodes, these are the objects that do the processing and what you directly manipulate to make, modify or otherwise bend the sound.
Processing happens top-down. So the top of the scene is generally where you would have your oscillators, the middle is where you would apply your filters and effects, and the bottom is where you would output the sound.
Instead of using the traditional method of drawing wires manually to create the signal path, Jasuto does this a little differently. Basically each node has a controllable radius and range. The radius is used to set the physical size of the node and the range is used to set the receiving range of the inputs.