Sudo Masaaki official site
For the reinstatement of
population ecology.

SUDO Masaaki Ph.D.
Statistical Modeling Unit, Institute of Agro-Environmental Sciences, NARO, JAPAN

About me

Sudo portrait

A pitiful man, who used to count mites day after day.


2015.08.12 New paper added: Sudo and Osakabe (in press) Env. Entomol.
2014.06.15 Hired as a post-doc in Tsukuba
2014.03.24 Ph.D. from the Graduate School of Agriculture, Kyoto University, Japan
2013.04.24 Our new paper on mite geotaxes is finally released from the Kyoto University repository!
2013.03.14 New paper added
2012.11.05 New paper added
2012.10.12 New paper added
2012.08.05 Modified
2012.06.25 Modified
2012.06.10 Modified
2012.05.30 Modified
2012.05.15 OPEN

The heartwarming story of the month

I know about a girl who sold her little brother down the river to get a piece of bread. Once she asked me,
"Did I make a wrong choice?"
I answered,
"Don't take it to heart. The worth of your life is equal to the one of your little brother--to wit, your life and a piece of bread is worth more than the life of your brother."
What I spoke seemed to put her fears to rest.

KABURI: a phytoseiid mite 2D action game.
Old Flash version

Home | English page


Phytoseiid mites; False spider mites; Leaf-surface microstructures; Solar UVB radiation, Thermoresponse, Environmental stress; Prey–predator interaction; Population/community ecology; Plant acarology

Educational background

Mar 2007Bachelor of Integrated Human Studies, Kyoto University, Japan
Mar 2009Master of Human and Environmental Studies, Kyoto University, Japan
Mar 2014Ph.D. from the Graduate School of Agriculture, Kyoto University, Japan


Apr 2011–Mar 2013JSPS research fellow DC2
June 2014–PresentPost-doc fellow in NIAES (2016-- integrated into NARO)




Refereed Journals

*: as a corresponding author

  1. *Masaaki Sudo, Sachiko Nishida, Takao Itioka (2010) Seasonal fluctuations in foliar mite populations on Viburnum erosum Thunb. var. punctatum Franch. et Sav. (Adoxaceae) and sympatric shrubs in temperate secondary forests in western Japan. Applied Entomology and Zoology 45 (3): 405–415. doi: 10.1303/aez.2010.405
  2. *Masaaki Sudo, Masahiro Osakabe (2011) Do plant mites commonly prefer the underside of leaves? Experimental and Applied Acarology 55 (1): 25–38. doi: 10.1007/s10493-011-9454-4 | Also available from the Kyoto University repository.
  3. Yuta Sakai, Masaaki Sudo, *Masahiro Osakabe (2012) Seasonal changes in the deleterious effects of solar ultraviolet-B radiation on eggs of the twospotted spider mite, Tetranychus urticae (Acari: Tetranychidae). Applied Entomology and Zoology 47 (1): 67–73. doi: 10.1007/s13355-011-0090-6
  4. Yuta Sakai, *Masaaki Sudo, Masahiro Osakabe (2012) A comparison of the effects of gravity and the nutritional advantage of leaf surfaces on fecundity in the two-spotted spider mite (Acari: Tetranychidae). Journal of the Acarological Society of Japan 21 (1): 1–6. doi: 10.2300/acari.21.1
  5. *Masaaki Sudo, Masahiro Osakabe (2013) Geotaxis and leaf-surface preferences mitigate negative effects of a predatory mite on an herbivorous mite. Experimental and Applied Acarology 59 (4): 409–420. doi: 10.1007/s10493-012-9622-1 | Also available from the Kyoto University repository.
  6. Midori Fukaya, Ryuji Uesugi, Hirokazu Ohashi, Yuta Sakai, Masaaki Sudo, Atsushi Kasai, Hidenari Kishimoto, *Masahiro Osakabe (2013) Tolerance to solar ultraviolet-B radiation in the citrus red mite, an upper surface user of host plant leaves. Photochemistry and Photobiology 89: 424–431. doi: 10.1111/php.12001
  7. *Masaaki Sudo, Masahiro Osakabe (2013) Stellate hairs on leaves of a deciduous shrub Viburnum erosum var. punctatum (Adoxaceae) effectively protect Brevipalpus obovatus (Acari: Tenuipalpidae) eggs from the predator Phytoseius nipponicus (Acari: Phytoseiidae). Experimental and Applied Acarology 60: 299–311. doi: 10.1007/s10493-012-9648-4 | Also available from the Kyoto University repository.
  8. *Otani Y, Yoshihiro S, Takahata Y, Zamma K, Nagai M. Kanie M, Hayaishi S, Fujino M, Sugaya K, Sudo M, Amanai S, Kaneda M, Tachikawa Y, Fukunaga Y, Okahisa Y, Higashi K, Hanya G (2013) Density of Japanese macaque (Macaca fuscata yakui) males ranging alone: seasonal and regional variation in male cohesiveness with the group. Mammal Study 38: 105–115.
  9. *Masaaki Sudo, Masahiro Osakabe (2015) Joint effect of solar UVB and heat stress on the seasonal change of egg hatching success in the herbivorous false spider mite (Acari: Tenuipalpidae). Environmental Entomology 44 (6): 1605–1613. doi: 10.1093/ee/nvv131

Presentation (international)

* as a speaker

Poster sessions

  1. *Masaaki Sudo, Sachiko Nishida, Takao Itioka (2008.10.09) The rich acarofauna on Viburnum erosum var. punctatum. International Symposium on Mites & Whitefly (P011). Daemyung Resort, Gyeongju, KOREA
  2. *Masaaki Sudo, Masahiro Osakabe (2012.03.19) Discrepancy between predator density and shelter availability: why false spider mites oviposit on less hairy surface of a leaf? The 5th EAFES International Congress (P1-236A#). Ryukoku University, Otsu, JAPAN
  3. *Masaaki Sudo, Daisuke Takahashi, Yoshito Suzuki, David A. Andow, Takehiko Yamanaka (2015.11.18) Insecticide-resistance management for various insect lifehistories: Is a mixture strategy always the best choice? 2015 Annual Meeting, Entomological Society of America (D3435). Minneapolis Convention Center, Minneapolis, MN, US

Oral presentations

  1. *Masaaki Sudo, Masahiro Osakabe (2012.07.11) How environmental heterogeneity between leaf surfaces affects spatial distribution and prey-predator interaction in plant mites. 7th Symposium of the EURopean Association of Acarologists (Session Behavioral Ecology and Life History EH01). Vienna, AUSTRIA
  2. *Masaaki Sudo, Masahiro Osakabe (2014.07.15) Solar radiation as a determinant of acarine community assembly and seasonal dynamics. XIV International Congress of Acarology (Symposium "Mites under the sun: how radiant heat, visible light or ultraviolet affect mite physiology, life history and community ecology?" S3-05-7). Kyoto Terrsa, Kyoto, JAPAN


SUDO Masaaki

Statistical Modeling Unit, Institute of Agro-Environmental Sciences, NARO
3-1-3 Kannondai, Tsukuba, Ibaraki (postal code 305-8604), JAPAN

E-mail: "masaaki" + at + ""