In order to achieve effective environmental education, field schooling in Ise-bay was carried out with help of Mie-University. This event is a 3 day cruise, aboard Mie-University's marine training ship （Sesuimaru） around Ise-bay. The schooling began in 2009, and continued every year since then, and 32 students in total have participated so far. An outline of this training and its effects are discussed in this paper. We conclude this field schooling has a highly positive effect on environmental education.

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Mitsumata-ike is located in Yatomi city in western Aichi prefecture. Municipal waste water is flowing into this lake, and water pollution is occurring. In order to estimate the eutrophication, studies of water quality and the ecosystem were carried out jointly with Kaisho-high school. The results in 2010 showed that eutrophication has been increasing in this lake, however, the ecosystem has been maintained, and many creatures are living there.

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The history of Vietnamese mathematics is an important part of the East Asian history of mathematics, but it has hardly been studied. One of the causes is that very few materials on the traditional Vietnamese mathematics have been discovered. Fortunately, it has become obvious that at least fourteen Vietnamese mathematical classics existed in the history of Vietnam. Nine of them were gathered by Mr. Zhang Yong about 1938, this is Mr. Zhang Yong's Collection on the Vietnamese Mathematical Classics. Now, the partial transcriptions of each book in it are in the Library of the Institute for the History of Natural Sciences, Chinese Academy of Sciences. Although the transcriptions are not enough, it is certain that they will give some hints for the study of the history of Vietnamese mathematics.

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