1. 1) JIS A 5207-2022 Sanitary wares, Japanese Standards Association JIS A 5207-2022 衛生器具―便器・洗面器類, 財団法人日本規格協会
2. 2) International Standard, ISO 31600:2022 Water efficiency labelling programmes – Requirements with guidance for implementation, 2022
3. 3) Norihiro HONGO and Masayuki OTSUKA：Effect of a Follow-Up Flush of a Water-Saving Toilet on the Carrying Performance of a Large-Diameter Horizontal Drainpipe, Transactions of The Society of Heating, Air-Conditioning and Sanitary Engineers of Japan, Vol.45, No.275, pp.1-8, 2020.2(in Japanese) 本郷智大, 大塚雅之：大口径排水横管における節水形大便器の後追い排水が搬送性能へ及ぼす影響に関する研究, 空気調和・衛生工学会論文集, 第 45 巻, 第 275 号, pp.1-8, 2020.2(DOI: https://doi.org/10.18948/shase.45.275_1 )
4. 4) Takumi YAMASHIRO, Masayuki OTSUKA et al.：Examination of Water-Saving Toilet Adaptation to Horizontal Branch Drainage Pipe System for SI Apartment Houses.-Understanding of Transport Performance of JIS Type Ⅰ and Ⅱ Toilets-, Technical papers of annual meeting, the Society of Heating, Air-Conditioning and Sanitary Engineers of Japan, pp.133-136, 2021.9(in Japanese) 山城匠, 大塚雅之ほか 3 名：SI 集合住宅の排水横枝管システムへの節水形大便器の適応に関する検討－JIS Ⅰ・Ⅱ形大便器での搬送性能の把握－, 空気調和・衛生工学会大会 学術講演論文集, pp.133-136, 2021.9(DOI: https://doi.org/10.18948/shasetaikai.2021.1.0_133 )
5. 5) Jing Sun, Airu Zhu et al.：Isolation of infectious SARS-CoV-2 from urine of a COVID-19 patient, Emerging Microbes & Infections, Vol.9, pp.991-993, 2020.5(DOI: https://doi.org/10.1080/22221751.2020.1760144 )