Re-evaluation of water purification function of the forest with high frequency measurements of water chemistry

• Project/Area Number: 17H03832
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Forest science
• Research Institution: Kyoto Prefectural University (2019); Kyoto University (2017-2018)
• Principal Investigator: Katsuyama Masanori 京都府立大学, 生命環境科学研究科, 教授 (40425426)
• Co-Investigator(Kenkyū-buntansha): 尾坂 兼一 滋賀県立大学, 環境科学部, 講師 (30455266) ; 芳賀 弘和 鳥取大学, 農学部, 准教授 (90432161)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000); Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2018: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2017: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
• Keywords: 森林の水質浄化機能 / 高時間分解能観測 / 自動観測センサー / 硝酸イオン濃度 / 溶存有機態炭素濃度 / 降雨流出過程 / 自動連続観測装置 / 水質浄化機能 / 森林 / 高時間分解能 / 物質循環

Outline of Final Research Achievements

Long-term observations of stream and groundwater quality were conducted at short intervals of less than 10 minutes. The stream and groundwater observation in a forested area in Shiga prefecture, and streamwater observation in a forested area in Okayama prefecture were carried out. The observation in Shiga prefecture revealed that both nitrate (NO3-) and dissolved organic carbon (DOC) concentrations responded sharply to fluctuations in stream flow, but the flow-concentration relationship was not constant and varied from case to case. However, due to the failure of this device, it was not possible to obtain stable data continuously for a long period of time. In the observation in Okayama prefecture, data were obtained stably except in the winter season when it was closed by snow, but it was found that sediment generated during floods affected the observed values.

Academic Significance and Societal Importance of the Research Achievements

本研究では水質を短時間間隔で測定可能な自動センサーを用いた。同種の装置適用は欧米では過去10年以上にわたって進んでおり、多くの成果が出ているが、日本国内では本研究が初の適用事例である。そのため、日本に森林流域で同種の装置を適用する上での問題点は何かを整理することが第1歩として重要である。結果として得られた、製品選びから設置・運用上の注意点に至る情報は学術コミュニティにおいて貴重な財産となる。また、この観測から得られた、森林流域における水質変動メカニズムの解明は、今後増加が予想される豪雨災害における森林の役割を評価する上で、社会的意義も大きいものである。

Research Products

• [Journal Article] Factors affecting dominant peak-flow runoff-generation mechanisms among five neighbouring granitic headwater catchments (2020)
  • Author(s): Iwasaki, K., Katsuyama, M., Tani, M.
  • Journal Title: Hydrological Processes Volume: 34 Issue: 5 Pages: 1154-1166
  • DOI: 10.1002/hyp.13656
  • Peer Reviewed
• [Journal Article] Long-term effects of evapotranspiration on the flow duration curve in a coniferous plantation forest over 40 years (2020)
  • Author(s): Tsuruta, K.,Kosugi, Y., Katsuyama, M., Kosugi, K., Suzuki, M., Tani, M.
  • Journal Title: Hydrological Research Letters Volume: 14 Issue: 1 Pages: 1-8
  • DOI: 10.3178/hrl.14.1
  • NAID: 130007786749
  • ISSN: 1882-3416
  • Peer Reviewed / Open Access
• [Journal Article] Comparison of nitrate export patterns in forested catchments in Japan and the Northeastern United States: A meta‐analysis (2019)
  • Author(s): Ohte Nobuhito、Katsuyama Masanori
  • Journal Title: Hydrological Processes Volume: 33 Issue: 25 Pages: 3184-3194
  • DOI: 10.1002/hyp.13612
  • Peer Reviewed
• [Journal Article] Effects of cryogenic vacuum distillation on the stable isotope ratios of soil water (2019)
  • Author(s): Tsuruta Kenji、Yamamoto Hiroyuki、Katsuyama Masanori、Kosugi Yoshiko、Okumura Motonori、Matsuo Naoko
  • Journal Title: Hydrological Research Letters Volume: 13 Issue: 1 Pages: 1-6
  • DOI: 10.3178/hrl.13.1
  • NAID: 130007586372
  • ISSN: 1882-3416
  • Peer Reviewed / Open Access
• [Journal Article] Effects of Spatial Scales on Runoff / Sediment Transport in Mountain Catchments (3) -Review for the Treatments of Numerical Models (2018)
  • Author(s): 横尾善之、丹羽諭、内田太郎、平岡真合乃、勝山正則、五味高志、水垣滋、浅野友子
  • Journal Title: JOURNAL OF JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES Volume: 31 Issue: 4 Pages: 245-261
  • DOI: 10.3178/jjshwr.31.245
  • NAID: 130007481580
  • ISSN: 0915-1389, 1349-2853
  • Year and Date: 2018-07-05
  • Peer Reviewed / Open Access
• [Journal Article] Effects of Spatial Scales on Runoff / Sediment Transport in Mountain Catchments (2) -Results from Intensively Studied Catchments (2018)
  • Author(s): 浅野友子、内田太郎、勝山正則、平岡真合乃、水垣滋、五味高志、丹羽諭、横尾善之
  • Journal Title: JOURNAL OF JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES Volume: 31 Issue: 4 Pages: 232-244
  • DOI: 10.3178/jjshwr.31.232
  • NAID: 130007481577
  • ISSN: 0915-1389, 1349-2853
  • Year and Date: 2018-07-05
  • Peer Reviewed / Open Access
• [Journal Article] Effects of Spatial Scales on Runoff / Sediment Transport in Mountain Catchments (1) - A Review of Field Observations on Catchment Area and Properties (2018)
  • Author(s): 浅野友子、内田太郎、五味高志、水垣滋、平岡真合乃、勝山正則、丹羽諭、横尾 善之.
  • Journal Title: JOURNAL OF JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES Volume: 31 Issue: 4 Pages: 219-231
  • DOI: 10.3178/jjshwr.31.219
  • NAID: 130007481578
  • ISSN: 0915-1389, 1349-2853
  • Year and Date: 2018-07-05
  • Peer Reviewed / Open Access
• [Journal Article] Hydro-biogeochemical Processes of a Riparian Wetland and Their Effects on Surface Water Quality in a Forested Catchment (2018)
  • Author(s): 勝山正則, 伊藤雅之，大手信人，谷誠
  • Journal Title: JOURNAL OF JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES Volume: 31 Issue: 3 Pages: 178-189
  • DOI: 10.3178/jjshwr.31.178
  • NAID: 130007384636
  • ISSN: 0915-1389, 1349-2853
  • Year and Date: 2018-05-05
  • Peer Reviewed / Open Access
• [Journal Article] A water acquisition strategy may regulate the biomass and distribution of winter forage species in cold Asian rangeland (2018)
  • Author(s): Tanaka‐Oda Ayumi、Endo Izuki、Ohte Nobuhito、Eer Deni、Yamanaka Norikazu、Hirobe Muneto、Nachinshonhor G. U.、Koyama Asuka、Jambal Sergelenkhuu、Katsuyama Masanori、Nakamura Takashi、Matsuo Naoko、Jamsran Undarmaa、Okuro Toshiya、Yoshikawa Ken
  • Journal Title: Ecosphere Volume: 9 Issue: 12
  • DOI: 10.1002/ecs2.2511
  • NAID: 120006863531
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Stream Runoff and Nitrate Recovery Times After Forest Disturbance in the USA and Japan (2018)
  • Author(s): Oda Tomoki、Green Mark B.、Urakawa Rieko、Scanlon Todd M.、Sebestyen Stephen D.、McGuire Kevin J.、Katsuyama Masanori、Fukuzawa Karibu、Adams Mary B.、Ohte Nobuhito
  • Journal Title: Water Resources Research Volume: 54 Issue: 9 Pages: 6042-6054
  • DOI: 10.1029/2017wr021986
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] N2O production by denitrification in an urban river: evidence from isotopes, functional genes, and dissolved organic matter (2017)
  • Author(s): NC. Thuan, Keisuke Koba, Midori Yano, Akiko Makabe, CT. Kinh, Akihiko Terada, Sakae Toyoda, Naohiro Yoshida, Yotaro Tanaka, Masanori Katsuyama, Muneoki Yoh
  • Journal Title: Limnology Volume: 19 Issue: 1 Pages: 115-126
  • DOI: 10.1007/s10201-017-0524-0
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Evapotranspiration and water source of a tropical rainforest in peninsular Malaysia (2017)
  • Author(s): Lion, M., Y. Kosugi, S. Takanashi, S. Noguchi, M. Itoh, M. Katsuyama, N. Matsuo and S.- A. Shamsuddin
  • Journal Title: Hydrological Processes Volume: 31 Issue: 24 Pages: 4338-4353
  • DOI: 10.1002/hyp.11360
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Temporal variations in stable isotopes in precipitation related to rainfall pattern in a tropical rainforest in peninsular Malaysia (2017)
  • Author(s): Marryanna L、Kosugi Y、Itoh M、Noguchi S、Takanashi S、Katsuyama M、Tani M、Siti-Aisah S
  • Journal Title: Journal of Tropical Forest Science Volume: 29 Issue: 3 Pages: 349-362
  • DOI: 10.26525/jtfs2017.29.3.349362
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Properties of small instream wood as a logjam clogging agent: Implications for clogging dynamics based on wood density, water content, and depositional environment (2017)
  • Author(s): Haga Hirokazu、Moriishida Takuya、Morishita Naoya、Fujimoto Takaaki
  • Journal Title: Geomorphology Volume: 296 Pages: 1-10
  • DOI: 10.1016/j.geomorph.2017.08.043
  • Peer Reviewed
• [Presentation] 森林撹乱後 20 年間の渓流水硝酸イオン濃度変動 (2020)
  • Author(s): 勝山正則, 大手信人
  • Organizer: 第131回日本森林学会
• [Presentation] 桐生水文試験地における 45 年間の流況曲線の変動 (2020)
  • Author(s): 鶴田健二, 小杉緑子, 勝山正則, 小杉賢一朗, 鈴木雅一, 谷 誠
  • Organizer: 第131回日本森林学会
• [Presentation] 中国山地中部の森林小流域における降雨時の水文・水質応答 (2020)
  • Author(s): 芳賀弘和, 勝山正則, 尾坂兼一
  • Organizer: 第131回日本森林学会
• [Presentation] 赤外線サーモグラフィを用いた飽和側方流の観測 (2020)
  • Author(s): 青木康真, 勝山正則
  • Organizer: 第131回日本森林学会
• [Presentation] 森林流域の地下水における脱窒プロセスの時空間変動とその要因 (2020)
  • Author(s): 白井崚太, 勝山正則, 福島慶太郎, 大西雄二, 木庭啓介
  • Organizer: 第131回日本森林学会
• [Presentation] 半島マレーシア熱帯雨林 Pasoh 森林保護区における降水・流出水の起源の推定 (2020)
  • Author(s): 緒方澄人, 小杉緑子, 伊藤雅之, 渡辺伸一, 勝山正則, 野口正二, 高梨 聡, Marryanna Lion
  • Organizer: 第131回日本森林学会
• [Presentation] 安定同位体比を用いた吸水深度推定を目的とした土壌・植物水抽出方法の検討 (2020)
  • Author(s): 村中麻咲, 小杉緑子, 勝山正則
  • Organizer: 第131回日本森林学会
• [Presentation] Comparison of hydrological control in streamwater residence times across headwater catchments (2019)
  • Author(s): Katsuyama, M., Haga, H., Fukushima, K., Oda, T., Fujimoto, M., Osaka, K. Nagano, R., Egusa, T
  • Organizer: AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] The Kiryu Experimental Watershed: 50-years forest dynamics and hydro-biogeochemical studies in Central Japan (2019)
  • Author(s): Katsuyama, M., Ohte, N., Kosugi, Y.
  • Organizer: AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Implications of the difference in seasonal variations of nitrate discharge from the temperate forest ecosystems between monsoon and non-monsoon zones (2019)
  • Author(s): Ohte, N., Katsuyama, M.
  • Organizer: AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Streamflow response and recovery after forest disturbance in different climates (2019)
  • Author(s): Oda, T. Band, L. E., Green, M. B., Scanlon, T. M., Sebestyen, S. D., McGuire, K. J., Adams, M. B., Katsuyama, M., Shimizu, T., Urakawa, R., Fukuzawa, K., Ohte, N.
  • Organizer: AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Stream Runoff and Nitrate Recovery Times: Evaluating Ecosystem Response to Forest Disturbance in the USA and Japan (2019)
  • Author(s): Adams, M. B., Oda, T., Green, M., Urakawa, R., Scanlon, T. M., Sebestyen, S. D., McGuire, K. J., Katsuyama, M., Fukuzawa, K., Ohte, N.
  • Organizer: IUFRO World Congress 2019 "Forest Research and Cooperation for Sustainable Development"
  • Int'l Joint Research / Invited
• [Presentation] Long‐term increasing trend ofline‐conditioned excess in groundwate (2019)
  • Author(s): Katsuyama, M.
  • Organizer: JpGU Meeting 2019
  • Int'l Joint Research
• [Presentation] 山地源流域間の渓流水平均滞留時間の相違を規定する要因 (2019)
  • Author(s): 勝山正則, 芳賀弘和, 福島慶太郎, 小田智基, 藤本将光, 尾坂兼一, 長野龍平, 江草智弘
  • Organizer: 第130回日本森林学会
• [Presentation] 山地源流域における六フッ化硫黄濃度と地下水滞留時間推定値の変動要因 (2019)
  • Author(s): 山田啄也, 勝山正則, 今泉祐紀, 辻村真貴, 榊原厚一
  • Organizer: 第130回日本森林学会
• [Presentation] 隣接森林流域における脱窒が地下水・渓流水の硝酸イオン濃度に与える影響 (2019)
  • Author(s): 白井崚太, 勝山正則, 福島慶太郎, 山田啄也, 木庭啓介
  • Organizer: 第130回日本森林学会
• [Presentation] 異なる 3 つの抽出方法による植物水及び土壌水の安定同位体比分析結果の比較 (2019)
  • Author(s): 村中麻咲, 勝山正則, 小杉緑子
  • Organizer: 第130回日本森林学会
• [Presentation] 赤外線サーモグラフィを用いた降雨に対する地下水流出応答の観測 (2019)
  • Author(s): 青木康真, 勝山正則
  • Organizer: 第130回日本森林学会
• [Presentation] 大起伏堆積岩山地における水質に着目した地下水流動経路の推定 (2019)
  • Author(s): 谷知幸, 小杉賢一朗, 正岡直也, 勝山正則
  • Organizer: 第130回日本森林学会
• [Presentation] 異なる土壌で育てたヒノキ苗の窒素安定同位体比にアーバスキュラー菌根菌が及ぼす影響 (2019)
  • Author(s): 田中穂, 松尾奈緒子, 松田陽介, 木庭啓介, 小杉緑子, 勝山正則, 徳地直子
  • Organizer: 第66回 日本生態学会大会
• [Presentation] High-frequency monitoring of nitrate in ground- and streamwater reveals variant C-Q relationship in a forest catchment (2018)
  • Author(s): Katsuyama, M., Osaka, K., Haga, H.
  • Organizer: AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] 高時間分解能水質観測データを用いた森林流域の渓流水硝酸イオン濃度変動の実態解明 (2018)
  • Author(s): 勝山正則, 尾坂兼一, 芳賀弘和
  • Organizer: 水文・水資源学会2018年度研究発表会
• [Presentation] Comparison of controlling factors of streamwater mean residence time across headwater catchments using water stable isotope (2018)
  • Author(s): Katsuyama, M., Haga, H., Fukushima, K., Oda, T., Fujimoto, M., Osaka, K., Nagano, R.
  • Organizer: JpGU Meeting 2018
  • Int'l Joint Research
• [Presentation] Relationship between spring water residence time and microbial information in headwater catchments underlain by different lithology, Japan and New Zealand (2018)
  • Author(s): Imaizumi, Y., Tsujimura, M., Yamamoto, C., Sugiyama, A., Ogawa, M., Sakakibara, K., Utsumi, M., Kato, K., Nagaosa, K., Mizugaki, S., Katsuyama, M., Yamada, T., Yano, S., Sasakura, N., Gusyev, M., Morgenstern, U., Stewart, M. K.
  • Organizer: AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] 中国山地中部の森林小流域における降雨流出応答と窒素濃度-流量関係の特徴―鳥取大学研究林・蒜山水文試験地での地中流の発生条件に基づく検討― (2018)
  • Author(s): 芳賀弘和, 勝山正則, 尾坂兼一
  • Organizer: 水文・水資源学会2018年度研究発表会
• [Presentation] 領域気候モデルと降水同位体比から見た紀伊半島の降水に対する森林からの蒸発散の影響 (2018)
  • Author(s): 石森仁博, 松尾奈緒子, 万田敦昌, 西井和晃, 立花義裕, 勝山正則
  • Organizer: 水文・水資源学会2018年度研究発表会
• [Presentation] 溶存イオン濃度の類似性を用いた地下水流動の推定 (2018)
  • Author(s): 金澤瑛, 丸山清輝, 石田孝司, 小杉賢一朗, 勝山正則, 正岡直也, 木治佐保
  • Organizer: 水文・水資源学会2018年度研究発表会
• [Presentation] 中国山地中部の森林域における積雪深と積雪密度の関係―鳥取大学研究林・蒜山水文試験地での積雪水量と雪面蒸発量の評価に向けて― (2018)
  • Author(s): 田中菜々, 芳賀弘和, 岩永史子, 勝山正則
  • Organizer: 水文・水資源学会2018年度研究発表会
• [Presentation] 中国山地中部のヒノキ人工林における冬期の樹冠遮断率―鳥取大学研究林・蒜山水文試験地での降雪配分と降雨配分に基づく検討― (2018)
  • Author(s): 馬場生実, 芳賀弘和, 勝山正則
  • Organizer: 水文・水資源学会2018年度研究発表会
• [Presentation] 中国山地中部の源流域河川における流量－濁度関係の特徴―鳥取大学研究林・蒜山水文試験地での夏・秋期と積雪・融雪期の出水比較― (2018)
  • Author(s): 山角彩香, 芳賀弘和, 勝山正則
  • Organizer: 水文・水資源学会2018年度研究発表会
• [Presentation] Integrated study on spatiotemporal variation of residence time in spring and groundwater at headwater catchments (2018)
  • Author(s): Tsujimura, M., Sakakibara, K., Katsuyama, M., Mizugaki, S.,Gusyev, M., Yamamoto, C., Sugiyama, A., Ogawa, M., Kato, K., Yamada, T., Yano, S., Sasakura, N., Morgenstern, U., Stewart, M. K.
  • Organizer: JpGU Meeting 2018
  • Int'l Joint Research
• [Presentation] Spatial distribution of residence time and total number of prokaryotes in spring water in headwater catchments underlain by different lithology (2018)
  • Author(s): Imaizumi, Y., Tsujimura, M., Yamamoto, C., Sugiyama, A., Ogawa, M., Sakakibara, K., Kato, K., Mizugaki, S., Katsuyama, M., Yamada, T., Yano, S., Sasakura, N., Gusyev, M., Morgentem, U., Stewart, M. K.
  • Organizer: JpGU Meeting 2018
  • Int'l Joint Research
• [Presentation] Experimental study on groundwater and spring water dating method using SF6 tracer during baseflow condition in headwater catchment (2018)
  • Author(s): Yamada, T., Katsuyama, M., Imaizumi, Y., Tsujimura, M., Sakakibara, K.
  • Organizer: JpGU Meeting 2018
  • Int'l Joint Research
• [Presentation] Observation of hydrogen and oxygen isotopes in the Kurobe River basin (2018)
  • Author(s): Matsuura, T., Tebakari, T., Katsuyama, M.
  • Organizer: JpGU Meeting 2018
  • Int'l Joint Research
• [Presentation] 溶存物質濃度の主成分分析による地下水流動の解析 (2018)
  • Author(s): 金澤瑛, 丸山清輝, 石田孝司, 小杉賢一朗, 勝山正則, 正岡直也, 木治佐保
  • Organizer: 平成30年度砂防学会
• [Presentation] ナトリウムイオン濃度に着目した、堆積岩山地における渓流流量・水質に基岩内地下水が及ぼす影響 (2018)
  • Author(s): 木治佐保, 小杉賢一朗, 勝山正則, 正岡直也, 小松正弥
  • Organizer: 平成30年度砂防学会
• [Presentation] 山地源流域における地下水・渓流水中の溶存二酸化炭素濃度の変化 (2018)
  • Author(s): 勝山正則
  • Organizer: 第129回日本森林学会
• [Presentation] 複合トレーサによる森林山地流域の水・土砂流出経路の理解 (2018)
  • Author(s): 水垣滋, 勝山正則, 小田智基, 大手信人, 谷瀬敦, 新目竜一
  • Organizer: 第129回日本森林学会
• [Presentation] A Worldwide Groundwater Isoscape: history of cycle stored in the bottles (2018)
  • Author(s): Katsuyama, M., Levia, D. and Tani, M.
  • Organizer: AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] 森林集水域における窒素循環が渓流水質に与える影響の解明 (2018)
  • Author(s): 梶谷侑生，尾坂兼一，勝山正則，中村高志，西田継
  • Organizer: 第52回日本水環境学会年会
• [Presentation] 源流域における小径流木の物理特性─密度、腐朽状態、および強度─ (2018)
  • Author(s): 芳賀弘和・盛石田拓也・森下直哉・藤本高明
  • Organizer: 第129回日本森林学会大会
• [Presentation] Long-term dynamics and future perspective of streamwater chemistry in forested headwater catchments (2017)
  • Author(s): Katsuyama, M., Ohte, N. and Osaka, K.
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] Stream runoff and nitrate recovery times after forest disturbance in the USA and Japan (2017)
  • Author(s): Oda, T,, Green, M. B., Urakawa, R., Scanlon, T. M., Sebestyen, S. D., McGuire, K. J., Katsuyama, M., Fukuzawa, K., Adams, M. B., and Ohte, N.
  • Organizer: AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Effects of extreme events on nitrogen export from forested ecosystems: a review (2017)
  • Author(s): Ohte, N., Osaka, K., Katsuyama, M., Oda, T. and Mizugaki, S.
  • Organizer: JpGU-AGU Joint Meeting 2017
  • Int'l Joint Research
• [Presentation] 森林渓流水中の硝酸イオン濃度に与える乾性沈着・湿性沈着の影響 (2017)
  • Author(s): 梶谷侑生, 尾坂兼一, 藤田健斗, 千代真照, 勝山正則, 中村高志, 西田継
  • Organizer: JpGU-AGU Joint Meeting 2017
• [Remarks] 勝山正則 個人ページ
  • URL: http://eureka.kpu.ac.jp/~katsu/
• [Remarks] 京都府立大学山地防災学研究室
  • URL: https://www2.kpu.ac.jp/life_environ/forest_hydro/index.html
• [Remarks]
  • URL: http://www.bluemoon.kais.kyoto-u.ac.jp/katsu/index.html
• [Remarks]
  • URL: http://www.bluemoon.kais.kyoto-u.ac.jp/katsu/index.html