The Japan Association for the Properties of Water and Steam


The Japan Association for the Properties of Water and Steam (JPAPWS) is made up of members of industry and academia specializing in science and technology related to the properties of water and steam. The purpose is to promote research presentations and exchange of opinions by researchers and engineers in related fields. The Society also serves as the Japanese national committee of The International Association for the Properties of Water and Steam (IAPWS).


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4-1-1 Hiyoshi, Kohoku-ku, Yokohama-shi, Kanagawa 223-8521 Japan

Yasuoka Laboratory, Department of Mechanical Engineering, Keio University


Tokushima Office

2-1 Minamijyousanjima-cho, Tokushima 770-8506 Japan 

Department of Applied Chemistry, Graduate School of Technology, Industrial and Social Sciences, Tokushima University


(Please replace (at) in the email address with @)

Tel: +81-88-656-7669


What's New

Click here for past news


October 21, 2022

The second general meeting of this fiscal year was held online.

September 27, 2022

Mr. Shin-ichi Terada (Toshiba Energy & Systems Solutions Corporation) made a presentation at a technical discussion meeting held by Thermal and Nuclear Power Engineering Society.

At the 2nd Water Quality Management Technical Review Subcommittee Meeting (6th Technical Discussion Meeting) held by Thermal Power and Nuclear Power Engineering Society, Mr. Terada gave a presentation introducing activities to develop criteria steam at geothermal power plants through joint implementation by IAPWS and JPAPWS.

September 14, 2021

Dr. Tatsuya Ishiyama (Univ. of Toyama) received the IAPWS Helmholtz Award

Dr. Tatsuya Ishiyama (Associate Professor, University of Toyama) has received the IAPWS Helmholtz Award 2020. The award lecture, which was postponed for a year due to the COVID-19 pandemic, was held on September 14, 2021, the first day of this year's IAPWS Symposium, under the title "Molecular Dynamics Study of Transport, Structure and Spectroscopy at Liquid Interfaces.

August 4, 2021

2021 IAPWS PCAS Symposium will be held online

The "2021 IAPWS PCAS Symposium (2021 PCAS)" will be held on August 26, 2021, as a web conference organized by Working Group on Physical Chemistry of Aqueous Systems (PCAS) of IAPWS (Chair of PCAS WG: Dr. Yoshida, JPAPWS). There is no fee to attend, and registration closes on August 20. For more details, please visit the symposium website.

April 1, 2021

Prof. Yasuoka appointed as Chair of JPAPWS

Former Vice Chair Prof. Kenji Yasuoka (Keio University) has been appointed as the Chair of JPAPWS.

February 3, 2021

IAPWS annual meetings 2021 will be held online

The annual meetings of IAPWS will be held from September 12-17, 2021, in a web conference format.

January 1, 2021

Prof. Nakahara appointed as President of IAPWS

The chair of our association, Prof. Masaru Nakahara (Kyoto University) has been appointed as the President of the International Association for the Properties of Water and Steam (IAPWS).

September 11, 2020

IAPWS EC hold web meetings

The IAPWS Executive Committee Meetings were held in a web conference format this year on September 11, 2020 Japan time.

April 8, 2020

IAPWS annual meetings 2020 canceled

The 2020 IAPWS Annual Meeting, which was scheduled to be held in Turin, Italy, was canceled due to the impact of the new coronavirus infection.

April 1, 2020

Establishment of Japan Association for the Properties of Water and Steam

As of April 1, 2020, this association was newly established as an organization that inherits the business of the Japan Society for the Promotion of Science, the 139th Committee of the University-Industry Cooperative Research Committees, whose installation period has expired at the end of the fiscal year 2019.