Our company's primary advantage is our ability to produce large, high-purity single-crystal diamonds. We have been selling substrates, wafers, and epi-wafers for diamond device development, seed crystals for laboratory-grown diamond (LGD, artificial gemstones) manufacturing, and optical components. To produce diamond materials suitable for various applications, we have continuously focused on developing large crystals since our founding. We are pleased to announce that we will now be launching substrates and wafers of various sizes with reduced nitrogen content. 1. Introduction Diamond possesses excellent semiconductor properties and is expected to be applicable in high-power control power devices and high-frequency, high-output devices. The manufacturing of such applications is envisioned to be done on large wafers. Since our establishment, we have been working on scaling up single-crystal diamonds, and we commercialized a 1-inch wafer in April 2025. However, until now, the nitrogen content of the single-crystal diamonds we have commercialized has been up to 8 ppm, with some exceptions. In the development of semiconductor devices, high nitrogen content can hinder a wide range of applications, and many users have requested diamond substrates with low nitrogen content. We have already launched (111) substrates with a nitrogen content of 0.5 ppm or less. However, we had not previously sold low-nitrogen substrates for (100) substrates, which are most frequently used in device development. This is due to manufacturing reasons: the presence of a small amount of nitrogen in the reaction gas during diamond growth stabilizes the growth, suppresses the formation of defects such as polycrystals, and improves the growth rate. Therefore, we have supplied materials with a certain amount of nitrogen as products to ensure stable characteristics. On the other hand, as diamond device development has diversified, it has become an important challenge for us to provide diamond substrat