Continuation of Research and Development Activities

「There were no significant changes in the status of the Group's research and development activities during the interim consolidated accounting period.」

「In the medical equipment business, the company developed and launched the 「ＡＡ－Ｈ２」 high-end audiometer, equipped with a wide range of new functions to meet the latest testing needs, in September 2025. It also developed a rechargeable, custom-made in-the-ear hearing aid for the 「リオネットプラス」, which improves comfort through a wide range of colors and options, and launched it in December 2025.」

「There were no material changes in the status of the Group’s R&D activities during the six months ended September 30.」

「In the particle measurement equipment business, the company advanced development of a cutting-edge model capable of measuring smaller particle sizes to address semiconductor miniaturization.」

「In the particle measurement equipment business, the company developed the 「ＫＣ－５２Ａ」 handheld particle counter, which expands the number of measurable particle-size ranges to 6 and improves ease of use through a simple operating screen, and launched it in November 2023.」

「There were no significant changes in the status of research and development activities of our group during the cumulative third quarter consolidated accounting period.」

「There were no significant changes in the status of the Group’s research and development activities during the first quarter of the consolidated cumulative period.」

「The Group's R&D activities are led by the company, which conducts R&D in the medical equipment, environmental equipment and particle measurement equipment fields with the aim of improving customer satisfaction and developing products that remain trusted over time. The Particle Measurement Equipment Division conducts R&D activities, including new product development, for particle measurement equipment.」

「There were no significant changes in the status of research and development activities of our group during the cumulative third quarter consolidated accounting period.」

「There were no significant changes in the status of research and development activities of our group during the cumulative third quarter consolidated accounting period.」

「There were no material changes in the status of the group's R&D activities during the first half of the current consolidated cumulative period.」

「There were no significant changes in the status of the Group’s research and development activities during the first quarter of the consolidated cumulative period.」

「In the 「リオネットシリーズ」, the company's main hearing aid lineup, the company developed the 「プレミエンスＶ」, which offers a lower price while retaining strong basic performance. It also developed the 「ＨＢ－Ａ６Ｈ」 behind-the-ear hearing aid for severe hearing loss that qualifies under the purchasing standards of the Comprehensive Support for Persons with Disabilities Act, and the 「ＨＢ－Ａ６ＥＳ」 hearing aid in an affordable price range of ¥100,000 per unit for one ear, and launched both products in July 2020.」

「There were no material changes in the status of the Group’s R&D activities during the nine months ended December 31.」

「There were no significant changes in the status of the Group’s research and development activities during the first quarter of the consolidated cumulative period.」

「The Group's R&D activities are led by the company, which conducts R&D in the medical equipment, environmental equipment and particle measurement equipment fields with the aim of improving customer satisfaction and developing products that remain trusted over time.」

「From April 2019, to increase the agility of its development operations, the company established a new Technical Development Center that consolidated engineers previously dispersed among its business divisions and R&D Center, and transitioned to a project-based development structure.」

「From April 2019, to increase the agility of its development operations, the company established a new Technical Development Center that consolidated engineers previously dispersed among its business divisions and R&D Center, and transitioned to a project-based development structure.」

「From April 2019, to increase the agility of its development operations, the company established a new Technical Development Center that consolidated engineers previously dispersed among its business divisions and R&D Center, and transitioned to a project-based development structure.」

「In hearing aids, the company developed six behind-the-ear models with smartphone compatibility and wireless connectivity under the 「リオネットシリーズ マキシエンス」 top-of-the-line model and the 「リオネットシリーズ マキシエンスＶ」 value model, as well as 2 water-resistant behind-the-ear models, and launched them in August 2018. It also developed the 「リオネットシリーズ プレミエンス」, which uses the same digital signal-processing unit as the above models to deliver more natural hearing while remaining in a more affordable price range, and launched it in February 2019.」

「There were no material changes in the status of the Group’s R&D activities during the nine months ended December 31.」

「There were no material changes in the status of the group's R&D activities during the first half of the current consolidated cumulative period.」

「There were no significant changes in the status of the Group’s research and development activities during the first quarter of the consolidated cumulative period.」

「In hearing aids, the company developed the 「リオネットシリーズ」, which delivers natural hearing with minimal discomfort through fast, seamless digital processing, and launched it in August 2017. In addition, through joint research with Nara Medical University, it developed the world's first bone-conduction hearing aid for people with hearing loss who cannot use conventional hearing aids, mainly because of congenital aural atresia or profuse otorrhea, and launched it in November 2017. In medical testing equipment, the company developed 「メディレポ（ＭｅｄｉＲｅｐｏ）」 software, which transmits the results of tests conducted using the company's medical testing equipment, including audiometers, to a medical institution's internal information system, and launched it in March 2018.」

「There were no material changes in the status of the Group’s R&D activities during the nine months ended December 31.」

「There were no material changes in the status of the group's R&D activities during the first half of the current consolidated cumulative period.」

「There were no material changes in the status of the Group’s R&D activities during the three months ended March 31.」

「In hearing aids, the company developed and launched numerous new products in July 2016, including the 「リオネットプレシアⅡＶ」, 「リオネットクラッセ」 and 「リオネットウィー」, which offer enhanced functionality over previous models, as well as the 「リオネットピクシー」, which combines high output with a compact, lightweight design for children with severe to profound hearing loss. In medical testing equipment, the company developed the 「ＡＡ－Ｍ１Ａ」 audiometer, which enables comprehensive hearing assessments at general hospitals and otolaryngology clinics, and launched it in May 2017.」

「There were no material changes in the status of the Group’s R&D activities during the nine months ended December 31.」

「There were no material changes in the status of the group's R&D activities during the first half of the current consolidated cumulative period.」

「There were no significant changes in the status of the Group’s research and development activities during the first quarter of the consolidated cumulative period.」