Books

Hirotani, H., 2010. Distribution and behavior of alkaline phosphatase in dam reservoirs, in Tanida, K. and Murakami, T. (eds.) Ecosystem and Management of Dam Reservoirs and Downstream Rivers, The University of Nagoya Press, Nagoya (in Japanese)

Hirotani, H. and Ochi, K., 2009. Effect of stream diversion on densities of Aeromonas hydrophila in a mountain stream in a headwater area In: Taniguchi, M., Burnett, W. C., Fukushima, Y., Haigh, M., and Umezawa, Y. (eds.) From Headwaters to the Ocean: Hydrological Changes and Watershed Management, 415-419, Taylor and Francis, London.

Hirotani, H., 2006. Encyclopedia of Limnology, Japanese Society of Limnology (in Japanese)

Sakurai, K., K. Torii, H. Hirai, H. Hirotani, K. Yonebayashi (eds.)  1990.  World of Soil —A Message from Earth—, Asakura Publishing Company, Tokyo (in Japanese)

Translations

Hirotani, H.  2003.  Risk Communication (Japanese Translation), in Fewtrell, L. and J. Bartram (eds.), Water Quality Guidelines, Standards and Health: Assessment of risk and risk management for water-related infectious disease, Gihodo Shuppan, Tokyo

Hirotani, H.  1992.  Legionella in Drinking Water (Japanese Translation), in McFeters, G. A. (ed.), Drinking Water Microbiology, Gihodo Shuppan, Tokyo

Peer Review Journal Article

Kagawa, H., Omoto, R., Ashikari, M., Mori, M., and Hirotani, H., 2011. Long-term effects if acid rain on the water quality of a stream flowing out of moderately acid-tolerant brown forest soil: a study of the Ishite River, Jap. J. Limnol., 72, 19-40 (in Japanese)

Hirotani, H., 2010. Effectiveness of a Water Quality Indicator based on the presence of Escherichia coli in Rivers Inhabited by Asian Clam (Corbicula fluminea), J. Environ. Conserv. Eng., 39, 10-15 (in Japanese)

Hirotani, H. and Yoshino, M., 2010. Microbial indicators in natural biofilms developed in the riverbed. Water Sci. Tech. 62(5), 1149-1153

Okugawa, A., Yoshimura, M., Hirotani, H., 2006. Risk assessment of river water using microbial index measured by enzymatic criteria, Proceedings of the Second Japan-Korea Joint Symposium on Limnology (2005, Osaka), 52-56

Kagawa, H. and Hirotani, H., 2006. Chlorophyll sedimentation in a deep reservoir in Japan.  Verh. Internat. Verein. Limnol.. 29, 1573-1577.

Hirotani, H., Nakagawa, A., and Kagawa, H., 2004. Vertical profiles of alkaline phosphatase activity in dam reservoirs and its relation with microbial parameters. Korean J. Limnol., 37(4), 406-410

Hirotani, H.  2004.  A practice of web-based mobile phone home learning system and the relation between its use grades of university students.  J. Multimedia Aided Edu. Res., 1(1):123-128 (in Japanese)

Hirotani, H., A. Nakagawa, and H. Kagawa.  2004.  Vertical profile of alkaline phosphatase activity in the water column of a dam reservoir.  J. Jpn. Soc. Wat. Environ., 27:175-180 (in Japanese)

Kagawa, H., H. Hirotani, and M. Mori.  2002.  Effects of plastic-coated sheet fences crossing the upper end of a reservoir on summer lake chlorophyll a concentration.  Verh. int. Ver. Limnol., 28:866-871

Hirotani, H., J. Naranjo, P. G. Moroyoqui, and C. P. Gerba.  2002. Demonstration of indicator microorganisms on surface of vegetables on the market in the United States and Mexico.  J. Food Sci., 67:1847-1850

Hirotani, H., A. Nakagawa, K. Ochi, and M. Daijo.  2001.  Fluctuation of alkaline phosphatase activity in stream and reservoir water in adjacent watersheds.  J. Jpn. Soc. Wat. Environ., 24:762-765 (in Japanese)

Kagawa, H., Y. Fukuroda, and H. Hirotani.  2000.  Nutritive elements in sediments relating to chlorophyll concentration in the epilimnion of a reservoir.  Verh. int. Ver. Limnol., 27:2198-2202

Hirotani, H., C. Sese, and H. Kagawa, H.  1999.  Correlations of Aeromonas hydrophila with indicator bacteria of water quality and environmental factors in a pristine stream.  Wat. Environ. Res., 71:132-138

Ishizuka, S., S. Tanaka, K. Sakurai, H. Hirai, H. Hirotani, K. Ogino, H. S. Lee, and J. J. Kendawang.  1998.  Characterization and distribution of soils at Lambir Hills National Park in Sarawak, Malaysia, with special reference to soil hardness and soil texture.  Tropics, 8:31-44

Hirai, H., H. Matsumura, H. Hirotani, K. Sakurai, K. Ogino, and H. S. Lee. 1997.  Soils and the distribution of Dryobalanops aromatica and D. lanceolata in mixed dipterocarp forest. – A case study at Lambir Hills National Park, Sarawak, Malaysia.  Tropics, 7:21-33

Kagawa, H. and H. Hirotani. 1995, Predicting the summer chlorophyll a concentration in a reservoir based on the environmental conditions of the preceding spring.  Hydrobiologia, 310:59-70

Hirotani, H., Y. Matsui, C. Sese, and H. Kagawa.  1992.  Positive correlations between catchment areas and densities of bacteria in the upper reaches of a river.  Wat. Sci. Tech., 26:1965-1972

Hirotani, H., H. Ohigashi, M. Kobayashi, K. Koshimizu, and E. Takahashi. 1991.  Inactivation of T5 phage by cis-vaccenic acid, an antivirus substance from Rhodopseudomonas capsulata, and by unsaturated fatty acids and related alcohols.  FEMS Microbiol. Lett., 77:13-18

Hirotani, H., Y. Agui, M. Kobayashi, and E. Takahashi.  1990.  Removal of coliphages from wastewater effluent by phototrophic bacteria.  Wat. Sci. Tech., 22-3:59-63

Okamoto, N., H. Hirotani, T. Sano, and M. Kobayashi.  1988.  Antiviral activity of the crude extracts of phototrophic bacteria to fish viruses.  Nippon Suisan Gakkaishi, 54:2225 (in Japanese)

Hirotani, H., M. Suzuki, M. Kobayashi and E. Takahashi.  1988.  Destruction of fecal coliphages during the composting process of porcine feces.  Soil. Sci. Plant Nutr., 34:467-469

Hirotani, H., M. Kobayashi, E. Takahashi, H. Yamada, and T. Kosaka.  1987.  Purification and activation of antiviral substance produced by phototrophs. Soil Microorganisms, 30:49-53 (in Japanese)

Kobayashi, M. and H. Hirotani.  1987.  Production of antiviral substance by phototrophic bacteria.  Soil Microorganisms, 30:43-48 (in Japanese)

Proceedings

Hirotani, H. and Yoshino M., 2009.  Microbial interaction of flowing water and the biofilm developed in the riverbed.  Processes in biofilms: Fundamentals to applications, Davis, CA, USA, September, Conference Proceedings, 181-186.

Hirotani, H., and Yoshimura, M. (2005) Using E. coli as a microbial indicator for water quality index in the river waters. 1st IWA-Aspire Conference and Exhibition, Singapore, July, Proceedings 6F-1.

Fluctuation of alkaline phosphatase activity in the headwaters and the factors affecting the activity.  IWA-Asia Pacific Regional Conference (Asian Waterqual 2003), Bangkok, October, Proceedings 408 (3Q5K15:1-5)

Hirotani, H., M. Taniguchi, M. Daijo, K. Ochi, A. Nakagawa, and H. Kagawa.   2001.  Respiratory activity and bacterial density in the upper reaches of a river.  First International Water Association (IWA) Asia-Pacific Regional Conference (Asian Waterqual 2001), Fukuoka, September, Proceedings I, 367-371

Hirotani, H. and T. Henmi.  2001.  Growth potentials of bacterial indicators in stream augmented with reclaimed water.  First International Water Association (IWA) Asia-Pacific Regional Conference (Asian Waterqual 2001), Fukuoka, September, Proceedings II, 435-438

Hirai, H., Matsumura, H., Hirotani, H., and Sakurai, K., 1995, Soils and the distribution of Dryobalanops aromatica and D. lanceolata in mixed Dipterocarp forest – A case study at Lambir Hills National Park, Sarawak, Malaysia, Lee, H. S., Ashton, P. S., and  Ogino, K. (eds.), Reports of a new program for promotion of basic sciences – Studies of global environmental change with special reference to Asia and Pacific regions, II-3 Long term ecological research of tropical rain forest in Sarawak, 92-109

Hirotani, H., M. Suzuki, M. Kobayashi, and E. Takahashi.  1990.  Destruction of fecal coliphages during the composting process of porcine feces, 14th International Congress of Soil Science, Kyoto, August, Transactions 4, 555-556

Hirotani, H., Y. Agui, M. Kobayashi, and E. Takahashi.  1989.  Removal of coliphages from wastewater effluent by phototrophic bacteria, International Symposium on Waste Management Problems in Agro-Industries, Istanbul, Turkey, September, Proceedings, 69-73

Abstracts

Hirotani, H. and Yoshino, M. 2011. Is biofilm developed in the riverbed a source or a refuge for bacterial indicators?  Faecal Indicators: problem or solution? Edinburgh, UK, June, P13.

Ma, Y. and Hirotani, H., 2011.  Bacteriophage in river water and riverbed biofilms. Japan Society on Water Environment 45th Annual Meeting, Sapporo, Japan, March, Abstracts, 595 (in Japanese)

Nonaka, Y., Okumura, R. and Hirotani, H., 2011.  Effect of growth condition on algal photosynthesis.  Kinki Branch of the Japanese Society of Limnology 22th Meeting, Kobe, Japan, March, Abstracts, 27 (in Japanese)

Hirotani, H. and Yamazoe, Y., 2010. Comparison of CNP ratios of biofilm developed under various conditions.  Biofilms IV: Communities Bridging Disciplines, Winchester, UK, September, Conference Handbook, 87.

Nonaka, Y., Okumura, R. and Hirotani, H., 2010. Measurement of photosynthetic activity of algae in irrigation reservoirs and its fluctuation. Society of Environmental Conservation Engineering 10th Meeting, Osaka, Japan, September, Abstracts, 16 (in Japanese)

Yamada, T., Ma, Y. and Hirotani, H., 2010.  Fluctuation of bacteriophage in river water and reverbed biofilms.  Kinki Branch of the Japanese Society of Limnology 21th Meeting, Hikone, Japan, March, Abstracts, 10 (in Japanese)

Yamazoe, Y. and Hirotani, H., 2010.  CNP ratio of biofilm and the environmental condition.  Kinki Branch of the Japanese Society of Limnology 21th Meeting, Hikone, Japan, March, Abstracts, 5 (in Japanese)

Hirotani, H. and Kunimoto, N., 2009. Alkaline phosphatase activity in the impounded water and its relation with photosynthetic activity. The 3rd IWA-APIRE Conference & Exhibition, Taipei, Taiwan, October, Abstracts, 77.

Nonaka, Y., Kunimoto, N. and Hirotani, H., 2009. Water quality of irrigation reservoir and the photosynthetic activity of algae. Society of Environmental Conservation Engineering 9th Meeting, Osaka, Japan, September, Abstracts, 1 (in Japanese)

Kunimoto, N. and Hirotani, H., 2009.  Photosynthesis activity in irrigation reservoir samples using the pulse amplitude modulation method. Japan Society on Water Environment 43th Annual Meeting, Yamaguchi, Japan, March, Abstracts, 123 (in Japanese)

Ma, Y. and Hirotani, H., 2009.  Bacteriophages present in riverbed biofilms.  Kinki Branch of the Japanese Society of Limnology 20th Meeting, Ohtsu, Japan, March, Abstracts, 5 (in Japanese)

Hirotani, H. and Henmi, T., 2008. Efficacies of rinse washing for the removal of MS2 phage, Escherichia coli, and Cryptosporidium oocysts from the surface of fresh vegetables. Current developments in food and environmental virology, Pisa, Italy, October, Abstracts, 72-73.

Hirotani, H., Yamazoe, Y., Kunimoto, N., and Yoshino, M., 2008. Measurement of surface area of stones in riverbeds and the effect of flow velocity on biofilm formation. Biofilms III: 3rd International Conference, München, October, Abstracts, 122.

Nakanishi, Y. and Hirotani, H., 2008. Detection of bacteriophages in the riverbed biofilms. Society of Environmental Conservation Engineering 8th Meeting, Osaka, Japan, September, Abstracts, 17 (in Japanese)

Hirotani, H., 2008.  A simple method to measure chlorophyll a in water using a digital camera. Japan Society on Water Environment 42th Annual Meeting, Nagoya, Japan, March, Abstracts, 306 (in Japanese)

Yoshino, M. and Hirotani, H., 2008.  Effect of E. coli present in riverbed biofilms to indicator organisms in water.  Kinki Branch of the Japanese Society of Limnology 19th Meeting, Ohtsu, Japan, March, Abstracts, 7 (in Japanese)

Hirotani, H. and Yoshino, M., 2008. Biofilm formed on streambed pebbles as a source of coliform bacteria and E. coli. IWA Biofilm Technologies Conference, Singapore, January, Abstract handbook, 396-397.

Hirotani, H. and Isogai, C., 2007. Production of alkaline phosphatase by bacteria during the long-term incubation at low temperature.  The 13th International Symposium on River and Lake Environment, Cheju, Korea, October, Abstract Book 264-267.

Hirotani, H., Yoshino, M., and Okugawa, A., 2007. Do the biofilms formed on the streambed pebbles serve as the sources of false-positive fecal indicators?  Watermicro 2007 (14th International Symposium on Health-Related Water Microbiology), Tokyo, Japan, September, 300-302.

Vidales-Contreras, J. A, Gerba, C. P., Karpiscak, M. M., Hirotani, H., Rodriguez-Fuentes, H., and Acuna-Askar, K., 2007. Fate of coliphage PRD1 in a subsurface flow constructed wetland.  Watermicro 2007 (14th International Symposium on Health-Related Water Microbiology), Tokyo, Japan, September, 212-214.

Nitta K. and Hirotani, H., 2007. Decolorization of colored effluent by phototrophic bacteria. Society of Environmental Conservation Engineering 7th Meeting, Osaka, Japan, September, Abstracts, 109 (in Japanese)

Yoshino, M. and Hirotani, H., 2007.  Presence of indicator organisms in the riverbed biofilms. Japan Society on Water Environment 41th Annual Meeting, Osaka, Japan, March, Abstracts, 574 (in Japanese)

Okugawa, A. and Hirotani, H., 2007.  Present status of risks caused by E. coli in the Ishikawa watershed. Japan Society on Water Environment 41th Annual Meeting, Osaka, Japan, March, Abstracts, 409 (in Japanese)

Isogai, C. and Hirotani, H., 2006.  Alkaline phosphatase activity of bacteria cultured under low temperature.  Kinki Branch of the Japanese Society of Limnology 18th Meeting, Ohtsu, Japan, March, Abstracts, 14 (in Japanese)

Okugawa, A., and Hirotani, H.  2006.  Relation of SS and coliforms measured by enzymatic criteria in a river.  Japanese Society of Limnology 71th Convention, Matsuyama, Japan, September, Abstracts, 199 (in Japanese)

Yoshimura M. and Hirotani, H., 2006. Bacterial community in the river bed biofilms.  Kinki Branch of the Japanese Society of Limnology 17th Meeting, Osaka, Japan, March, Abstracts, 23 (in Japanese)

Yoshino, M. and Hirotani, H., 2006. Regrowth of bacteria in the sediment in an irrigation reservoir.  Kinki Branch of the Japanese Society of Limnology 17th Meeting, Osaka, Japan, March, Abstracts, 1 (in Japanese)

Okugawa, A., Yoshimura, M, and Hirotani, H., 2005. Risk assessment of river water using microbial index measured by enzymatic criteria. The Second Japan-Korea Joint Symposium on Limnology, Osaka, Japan, September, Abstract 2, 92

Yoshimura, M., Okugawa, A., and Hirotani, H.  2005.  Activity of riverbed bacteria.  Japanese Society of Limnology 70th Convention, Osaka, Japan, September, Abstracts, 141 (in Japanese)

Tou, K., Ueda, K., and Hirotani, H., 2005. Direct clarification of waterway by Kawakami village cedar charcoal. Society of Environmental Conservation Engineering 11th Meeting, Osaka, Japan, September, Abstracts, 151 (in Japanese)

Hirotani, H., 2005, Phosphorus nutrition of algae and alkaline phosphatase activity in suburban reservoirs. Japan Society on Water Environment 39th Annual Meeting, Chiba, Japan, March, Abstracts, 302 (in Japanese)

Isogai, C. and Hirotani, H., 2005. Alkaline phosphatase activity and water quality in Hatao –Kami and –Shimo Ponds.  Kinki Branch of the Japanese Society of Limnology 16th Meeting, Nara, Japan, March, Abstracts, 16 (in Japanese)

Okugawa, A. and Hirotani, H., 2005.  Measurement of fecal indicator bacteria in river water using Colilert18.  Kinki Branch of the Japanese Society of Limnology 16th Meeting, Nara, Japan, March, Abstracts,  7 (in Japanese)

Hirotani, H., Nakagawa, A., and Kagawa, H. (2004) Seasonal cycle and the vertical profile of alkaline phosphatase activity in dam reservoirs.  The First Korea-Japan Joint Limnology Symposium, Busan, Korea, May, Abstracts, 57.Hirotani, H., K. Ochi, and A. Nakagawa.  2003.  

Hirotani. H., 2004.  Alkaline phosphatase activity and water quality of reservoirs located in the suburban area.  Japanese Society of Limnology 69th Convention, Niigata, Japan, September, Abstracts, 253 (in Japanese)

Kagawa, H. and Hirotani, H.  2004.  Chlorophyll sedimentation in a deep dam reservoir in Japan.  SIL XXIX Congress, Lahti, Finland, August, Book of Abstracts, 386.

Hirotani, H.  2004.  Alkaline phosphatase activity in reservoirs located in the suburban area.  Japan Society on Water Environment 38th Annual Meeting, Sapporo, Japan, March, Abstracts, 586 (in Japanese)

Yoshimura, M. and H. Hirotani.  2004.  Distribution of fecal pollution indicator microorganisms among Yamato River Basin.  Kinki Branch of the Japanese Society of Limnology 15th Meeting, Osaka, Japan, March, Abstracts, 2 (in Japanese)

Hirotani, H.  2003.  Status of the fungi covering wall carvings of Historic Takaida Tombs and its countermeasure.  Japanese Society of Soil Science and Plant Nutrition 49th Annual Meeting, Kanagawa, Japan, August, Abstracts, 171

Nakagawa, A. and H. Hirotani.  2002.  Vertical distribution of alkaline phosphatase activity in a dam reservoir in a summer season.  Japan Society on Water Environment 36th Annual Meeting, Okayama, Japan, March, Abstracts, 460 (in Japanese)

Hirotani, H. and T. Henmi.  2001.  Indicator bacteria in the stream water mixed with treated sewage water.  Japanese Society of Limnology 66th Convention, Sendai, Japan, October, Abstracts, 132 (in Japanese)

Tosa, K., H. Katayama, M. Kaneko, H. Ichikawa, K. Kawamura, G. Endo, M. Ishii, and H. Hirotani.  2001.  A proposal on the standard for bacterial quality of drinking water.  Japan Society on Water Environment Fourth Symposium, Fukuoka, Japan, September, Abstracts, 177-180 (in Japanese)

Hirotani, H. and T. Henmi.  2001.  Use of the most probable number in water science and its accuracy.  Japan Society on Water Environment 35th Annual Meeting, Gifu, Japan, March, Abstracts, 506 (in Japanese)

Kagawa, H., H. Hirotani, H. and M. Mori.  2001.  Effects of Plastic-Coated Sheet Fences Crossing the Upper End of a Reservoir on Summer Lake Chlorophyll a Concentration.  28th Congress of the International Association of Theoretical and Applied Limnology SIL, Melbourne, Australia, February, Abstracts

Hirotani, H. and K. Ochi.  2000.  Effect of stream diversion on stream bacteria.  Japanese Society of Limnology 65th Convention, Fukuoka, Japan, September, Abstracts, 77 (in Japanese)

Hirotani, H. and K. Ochi.  2000.  Effect of stream diversion on densities of Aeromonas hydrophila in a mountain stream.  1st World Water Congress of the International Water Association (IWA), Paris, July, Conference Preprint Book 7, 163-164

Hirotani, H. and K.Ochi.  2000.  Bacteria and their activity in streams.  Japan Society on Water Environment 34th Annual Meeting, Kyoto, Japan, March, Abstracts, 444 (in Japanese)

Hirotani, H., K. Ochi, and H. Kagawa.  1999.  Change in water quality and bacterial activity along the stream.  Japanese Society of Limnology 64th Convention, Hikone, Japan, October, Abstracts, 31 (in Japanese)

Hirotani, H., G. A. Toranzos, J. Sandoval-Garzon, M. M. Karpiscak, and C. P. Gerba.  1998.  Flow measurement of the constructed wetlands using bacteriophage.  Japanese Society of Limnology 63rd Convention, Matsumoto, Japan, September, Abstracts, 222 (in Japanese)

Kagawa, H., Y. Fukuroda, and H. Hirotani.  1998.  Constituent of lake sediments reflecting chlorophyll a concentration of the epilimnion in a dam reservoir.  Japanese Society of Limnology 63rd Convention, Matsumoto, Japan, September, Abstracts, 119 (in Japanese)

Kagawa, H., Y. Fukuroda, and H. Hirotani.  1998.  Nutritive elements in sediments relating to chlorophyll concentration in the epilimnion in a reservoir.  XXVII Congress of International Association of Theoretical and Applied Limnology, Dublin, Ireland, August, Abstracts, 294

Hirotani, H. and H. Kagawa.  1998.  Respiratory activity and bacterial density in the upper reaches of a river. Water Quality International 1998, Vancouver, Canada, June, No. P-1005

Hirotani, H., G. A. Toranzos, J. Sandoval-Garzon, M. M. Karpiscak, and C. P. Gerba.  1998.  Survival of bacteriophages in constructed wetlands.  Japan Society on Water Environment 32nd Annual Meeting, Gifu, Japan, March, Abstracts, 174 (in Japanese)

Hirotani, H. and M. Daijo.  1997.  Enzymatic activity of stream water microorganisms.  Japanese Society of Limnology 61th Convention, Nara, Japan, August, Abstracts, 108 (in Japanese)

Sandoval-Garzon, J., G. A. Toranzos, H. Hirotani, and C. P. Gerba.  1997.   Bacteriophage survival in constructed wetlands. American Society for Microbiology 97th General meeting, Miami Beach, Florida, USA, May, Abstracts, 484

Hirotani, H., M. Taniguchi, and H. Kagawa.  1995.  Bacterial counts and activity in the upper reaches of a river.  Japanese Society of Limnology 60th Convention, Nagoya, Japan, October, Abstracts, 60 (in Japanese)

Hirai, H., H. Matsumura, H. Hirotani, and K. Sakurai.  1995.  Characteristics of soil developed under Dryobalanops aromatica and D. lanceolata in mixed dipterocarp forest - A case study at Lambir Hills National Park, Sarawak, Malaysia.  Japanese Society of Soil Science and Plant Nutrition 41th Annual Meeting, Sendai, Japan, April, Abstracts, 134 (in Japanese)

Mori, M., H. Kagawa, and H. Hirotani.  1994.  Chemical factors affecting dissolved oxygen concentration in streamwater.  Japanese Society of Limnology 59th Convention, Hachioji, Japan, September, Abstracts, 98 (in Japanese)

Hirotani, H., M. Taniguchi, and H. Kagawa.  1994.  An attempt to measure biological activity in streamwater by INT reduction.  Japanese Society of Limnology 59th Convention, Hachioji, Japan, September, Abstracts, 111 (in Japanese) 

Hirai, H., H. Matsumura, H. Hirotani, and K. Sakurai.  1994.  Soils and distribution of Dryobalanops aromatica and D. lanceolata in mixed dipterocarp forest - A case study at Lambir Hills National Park, Sarawak, Malaysia. Workshop “Long Term Ecological Research in relation to Forest Ecosystem Management”, Kuching, Sarawak, Malaysia, July, Abstract, Session 1-No.7

Kagawa, H. and H. Hirotani.  1993.  Annual fluctuation of summer chlorophyll a concentration in a dam reservoir.  Japanese Society of Limnology 58th Convention, Matsue, Japan, November, Abstracts, 129 (in Japanese)

Hirotani, H., C. Sese, and H. Kagawa.  1993.  Distribution of Aeromonas hydrophila in the upper reaches of a river.  Japanese Society of Limnology 58th Convention, Matsue, Japan, November, Abstracts, 160 (in Japanese)

Kagawa, H., M. Mori, H. Hirotani.  1992.  Entity of Ca-Mg index which affects phosphorus nutrition of algae in dam reservoirs.  Japanese Society of Limnology 57th Convention, Beppu, Japan, October, Abstracts, 93 (in Japanese)

Hirotani, H., Nakagawa, A., and Kagawa, H.  2004.  Seasonal cycle and the vertical profile of alkaline phosphatase activity in dam reservoirs.  The First Korea-Japan Joint Limnology Symposium, Busan, Korea, May, Abstracts, 57.

Kagawa, H. and H. Hirotani.  1992.  Forecast of the summer chlorophyll-a concentration in a reservoir using environmental condition of the preceding spring, 2nd International Conference on Reservoir Limnology and Water Quality, Ceske Budejovice, Czechoslovakia, August, Abstract, 43

Kagawa, H. and H. Hirotani.  1991.  Physical and chemical factor controlling photosynthetic activity in a shallow stream.  Japanese Society of Limnology 56th Convention, Nara, Japan, November, Abstracts, 97 (in Japanese)

Hirotani, H., Y. Matsui, and H. Kagawa.  1991.  Positive correlation between fecal coliforms, plate count bacteria and the catchment area in the upper reaches of a river.  Japan Society on Water Environment 56th Annual Meeting, Sendai, Japan, March, Abstracts, 34 (in Japanese)

Hirotani, H., Y. Matsui, and H. Kagawa.  1990.  Effect of catchment areas on plate counts of stream bacteria.  Japanese Society of Limnology 55th Convention, Yamagata, Japan, November, Abstracts, 2 (in Japanese)

Hirotani, H., Y. Agui, M. Kobayashi, and E. Takahashi.  1988.  Viral inactivation by phototrophic bacteria during wastewater treatment.  Japanese Society of Soil Science and Plant Nutrition Kansai Branch Meeting, Fukuyama, Japan, October, Abstracts 35, Part II, 338 (in Japanese)

Kobayashi, M., H. Hirotani, and E. Takahashi.  1987.  Antiviral substance from phototrophic bacteria, VII International Congress of Virology, Edmonton, Canada, August, Abstracts, 255 (in Japanese)

Kobayashi, M., H. Yamada, H. Hirotani, T. Kosaka, and E. Takahashi.  1985.  Antiviral activity of phototrophs.  Japanese Society of Soil Science and Plant Nutrition Kansai Branch Meeting, Kochi, Japan, October, Abstracts 32, Part II, 269 (in Japanese)

Hirotani, H., M. Kobayashi, and E. Takahashi.  1984.  Purification of antiviral substance produced by phototrophic bacteria.  Japanese Society of Soil Science and Plant Nutrition Showa-59 Annual Meeting, Sendai, Japan, August, Abstracts, 53 (in Japanese)

Trade Journals, Other

Hirotani, H.  2002.  Session report of the Japan Society on Water Environment 36th Annual Meeting “Water Environment (impounded water)”.  J. Jpn. Soc. Wat. Environ., 25:319 (in Japanese)

Hirotani, H.  2001.  Importation of fresh and frozen vegetables and fruits adhering pathogens.  Urakami Foundation Memoirs, 9:45-52 (in Japanese, abstract in English)

Hirotani, H.  2000.  Legionella contamination of drinking waters.  J. Water and Waste, 42:684-687 (in Japanese)

Hirotani, H.  1999.  Let’s measure the streamwater.  In: Education Program Development Committee for Natural Science (eds.), Handbook of learning familiar environment, Ozu Children’s Nature Center, Ozu, Japan, 6-8

Hirata, T., T. Omura, Y. Ishibashi, E. Shimohara, and H. Hirotani.  1997.  Outbreaks of waterborne diseases in the world —Infections diseases transmitted by supplied drinking water—.  J. Jpn. Soc. Wat. Environ., 20:124-128 (in Japanese)

Hirotani, H.  1991.  Recycling treatment of organic wastewater (including inactivation of virus).  Environ. Conserv. Eng. 20:621-624 (in Japanese)

Hirai, H., K. Sakurai, H. Hirotani, K. Torii, and K. Yonebayashi.  1989.  An questionnaire survey on soil targeting pupils and students of elementary schools, junior high schools, high schools and universities.  Pedologist, 33:67-74 (in Japanese)