Onomichi Hirokazu gave an introduction to connecting ROS and VRChat. He discussed using VRChat as a virtual environment to interact with robots in simulation. Key points included using ROS and OSC messages to control virtual objects from a real robot, and using a virtual motion tracker and ROS tf to map robot joint states to an avatar in VRChat. He demonstrated controlling an avatar's limbs based on data from Dynamixel servos. The goal is to enable remote participation in robot events using VR.