Hamamatsu Photonics KK is a Japan-based company mainly engaged in manufacturing and selling optoelectronic products, including photomultiplier tubes, imaging equipment and light sources, optical semiconductor devices, image processing and measurement equipment, laser equipment, and laser components. The Company operates four business segments. The Electron Tube Business Segment manufactures and sells photomultiplier tubes, imaging equipment, and light sources. The Optoelectronic Semiconductor Business Segment manufactures and sells optoelectronic semiconductor devices and other products. The Image Processing and Measurement Equipment Business Segment manufactures and sells image processing and measurement equipment and other products. The Laser Business Segment manufactures and sells laser equipment and laser equipment components, among other products. In addition, the Company also engages in the hotel business and operations related to proprietary products.