Solar Cooking
Solar Cooking
Last edited: 22 April 2020      

Ashikaga University is located in Ashikaga, Japan. Yuichi Nakajo is a professor of mechanical engineering and the Director of Collaborative Research Center at the university.


Fifth Japan Solar Cooker Convention in Chikusei, Nov. 2017

  • November 2017: The Fifth Japan Solar Cooker Convention took place on November 17th in Chikusei, Japan, which was well attended. The event was organized by Professor Yuichi Nakajo of Ashikaga University.

Attendees at the Japan Solar Cooker Preliminary Convention.

  • November 2014: The Japan Solar Cooker Preliminary Convention was held on November 22nd and 23rd at Ashikaga University. The convention was led by Professor Yuichi Nakajo with the goal of creating a network for manufacturers, distributors, traders, researchers, and others with a strong interest in solar cooking to collaborate. The event was attended by roughly 100 invited participants. Professor Nakajo is planning to hold a larger convention next year which will will be open to anyone interested in solar cooking.

Yuichi Nakajo solar cooking workshops

  • November 2012: Yuichi Nakajo, Director of Collaborative Research Center Ashikaga University, reports on his solar cooker usage research - Yuichi Nakajo's field is the development of solar cookers for use in mid-latitude regions. He concentrates on designing cookers which work in Japan all the year, because the primary use of them is for education. The solar panel cooker, Educooker 003, was designed to be robust, and at the same time offer good concentration of the wide range of the sun's elevation by employing a ray tracing technique. Now we are going to put the durable plastic version, developed through the joint research with the Japanese largest aluminum foil company, Toyo Aluminum K. K., into the market. Our other products include plastic concentrator types with discretely approximated parabolic reflectors for uniform and safe heating. To satisfy the need and wants from all users, we prepare the kits with various types with wide price range. Many Japanese say solar cookers are only educational materials and are not reliable, because you cannot use it on the rainy days. But I do not believe it. Last March I sent all the members in my laboratory the Educooker to several disaster areas by request, but unfortunately I did not receive any replies. I suspect most of them were never tried. We cannot force them to use solar cookers, but at least warm food and warm drink could be of considerable help. I reconfirmed the importance of everyday education of solar cooking for everyone. That is the reason I conduct more than fifty classes each year. For more information:


See also[]

External links[]

  • Nakajo Lab. chronicles the solar cooking history and projects initiated by Professor Yuichi Nakajo of Ashikaga University.


Prof. Yuichi Nakajo
Nakajo Lab, Ashikaga University
268-1 Omae-cho
Tochigi 326-8558

Tel: +81 0284-62-0605
Fax: +81 0284-62-9802