Yuichiro Toyohara

Fixing device having a power supply control element for controlling a temperature of a heat member

Image forming apparatus with changeable toner returning electric field application period

Image formation system, image formation method, and image quality improvement method

Image forming apparatus which corrects image forming conditions in low-temperature environment and at continuous image formation

Image forming apparatus capable of accomplishing uniformity in glossiness

Image forming apparatus with interchangeable developing devices

Image processing apparatus and method for improving image reproducibility

Image forming apparatus capable of changing usage ratio among multiple toners

Image forming apparatus having a plurality of image forming speeds

Fixing apparatus with power control based on temperature gradient