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(H:6, S:2, U:1, N:2)(H: 3, S:1, U:2, N:1)(H:2 (+1)*, U:1, N(1)*)(H:2)212071(H:1, U:1)Department of Radiation Oncology, and I was appointed to be the first Chair. Juntendo Hospital is now equipped with three cutting-edge Linacs and a remote after-loading brachytherapy system. These facilities permit the treatment of virtually all cancer types that are suitable candidates for radia‑tion therapy. Table 1 summarizes the results of radiation therapy for major diseases in our depart‑ment14). Generally, these values were better than expected. Other affiliated hospitals have also been equipped with new instruments, including Shizuoka Hospital (Shizuoka, Japan), with one; Urayasu Hospital, with two, and Nerima Hospital (Tokyo, Japan), with one (Table 2). Tables 2 and 3 summa‑rize the changes in the radiation therapy facilities in the Juntendo University group and the number of patients treated at Juntendo Hospital, Hongo. Although there are few members in the Depart‑ment of Radiation Oncology, the number has grad‑ually increased to 11 ROs and 3 physicists.Research at the Department of Radiation OncologyResearch themes at the Department of Radiation Oncology include both the basic and clinical fields, H: Juntendo Hospital, S: Shizuoka Hospital, U: Urayasu Hospital, N: Nerima Hospital,* numbers in parenthesis mean medical physicists at the faculty of health scienceTable 2　Changes of the radiation therapy facilities in Juntendo University from 2000 to 2021Table 3　Changes of numbers of patients who received radiation therapy at Juntendo Hospital, Hongo, from 2000 to 2020Linear acceleratorRemote after loading systemRadiation OncologistMedical physicistPatients who received radiation therapyIMRTSRTbrachytherapyIMRT: intensity modulated radiation therapy including VMAT (volumetric‑modulated arc therapy)SRT: stereotactic radiation therapy (including stereotactic radiosurgery)2000（U:1）20004500320which is very similar to themes in other depart‑ments. Basic research includes both medical physics and radiation biology. Although my majors were clinical and radiation biological research, the lack of personnel was limited to the clinical and medical physics themes at Juntendo. During these years, the department published only a few articles in English; however, this number is now increasing as the number of members in our department has increased. Among these publications, Akamatsu et al. reported a close relationship between the prog‑nosis of patients with esophageal squamous cell carcinoma and the expression of c-erbB-2 in tumor tissue15). Kunogi et al. predicted the radiosensitivity of tumor cells by simultaneously detecting histone H2AX phosphorylation and apoptosis16). Recently, we reported that patients who underwent radia‑tion therapy for cranial diseases experienced unusual visual and olfactory sensations17, 18). Among them, one woman who underwent resection of the olfactory bulb and epithelium reported a pungent smell during the radiation session19). This phenom‑enon suggests that the central nervous system can detect X-rays, even in humans. 2021（H:1）113 (+2)*202010032715547337