01 Plateumaris dorsara Hayashi, 2007 (fossil taxa) [Chrysomelidae]
02 Donaciella nagaokana Hayashi, 2008 (fossil taxa) [Chrysomelidae]
03 Plateumaris virens Hayashi, 1999 (fossil taxa) [Chrysomelidae]
04 Donacia uedana Hayashi, 2000 (fossil taxa) [Chrysomelidae]
05 Donacia tominagai Hayashi, 2000 [Chrysomelidae]
06 Plateumaris kinugasana Hayashi, 2001 (fossil taxa) [Chrysomelidae]
07 Donacia yoshitomii Hayashi, 2003 [Chrysomelidae]
08 Donacia miyatakei Hayashi, 2004 [Chrysomelidae]
09 Donacia luso Hayashi & Lee, 2007 [Chrysomelidae]
10 Donacia hungi Hayashi & Pütz, 2008 [Chrysomelidae]
11 Donacia lungtanensis Hayashi & Lee, 2009 [Chrysomelidae]
12 Halorhadinus sawadai Maruyama & Hayashi, 2009 [Staphylinidae]
13 Satonius fui Hajek, Yoshitomi, Fikacek, Hayashi & Jia 2011 [Torridincolidae]
14 Satonius jaechi Hajek, Yoshitomi, Fikacek, Hayashi & Jia 2011 [Torridincolidae]
15 Drupeus ogatai Yoshitomi & Hayashi, 2013 [Ptylodactylidae]
16 Zaitzeviaria sotai Hayashi & Yoshitomi, 2015 [Elmidae]
17 Nyholmia okiensis Yoshitomi & Hayashi, 2016 [Scirtidae]
18 Leptelmis torikaii Kamite, Yoshitomi & Hayashi, 2017 [Elmidae]
19 Donacia takakuwai Hayashi & Tominaga, 2017 [Chrysomelidae]
20 Donacia dorsohirsuta Hayashi & Tominaga, 2017 [Chrysomelidae]
21 Ochthebius sasakii Yoshitomi, Karube & Hayashi, 2019 [Hydraenidae]
22 Hydrocassis fujiwarai Kamite & Hayashi, 2019 [Hydrophilidae]
23 Podonychus gyobu Yoshitomi & Hayashi, 2020 [Elmidae]
24 Hydraena obaei Hayashi & Yoshitomi, 2020 [Hydraenidae]
25 Zaitzeviaria takafumii Hayashi & Yoshitomi 2021 [Elmidae]
26 Byrrhinus satoi Yoshitomi & Hayashi, 2021 [Limnichidae]
27 Byrrhinus uenoi Yoshitomi & Hayashi, 2021 [Limnichidae]
28 Byrrhinus tainanensis Yoshitomi & Hayashi, 2021 [Limnichidae]
29 Stenelmis amami Yoshitomi & Hayashi, 2021 [Elmidae]
30 Zaitzevia wakayamana Iawata, Hayashi & Yoshitomi, 2022 [Elmidae]
31 Pseudovelia lasiomma Watanabe & Hayashi, 2023 [Hemiptera: Heteroptera: Veliidae]
32 Haliplus morii Hayashi, Iwata & Yoshitomi, 2023 [Haliplidae]
33 Hydraena hokuto Hayashi & Iwata, 2023 [Hydraenidae]
34 Nagisavelia hikarui Watanabe, Nakajima & Hayashi, 2023 [Hemiptera: Heteroptera: Veliidae]
35 Hydraena watanukii Hayashi, 2024 [Hydraenidae]
36 Hydraena nihonkoku Hayashi, 2024 [Hydraenidae]
37 Grouvellinus ganban Hayashi, Kamite & Ogawa, 2024 [Elmidae]
38 Grouvellinus yaku Hayashi, Kamite & Ogawa, 2024 [Elmidae]
39 Hydraena (Hydraenopsis) kandai Hayashi & Noishiki, 2025 [Hydraenidae]
40 Zaitzeviaria gifu Hayashi, Nagano & Kamite, 2025 [Elmidae]
41 Limnebius miyazakii Hayashi, 2025 [Hydraenidae]