The temperature, humidity and wind character within of park and open space in the Tokyo Metropolis which comprises the object of this study were observed from 1961 to 1967 centering on the summer season. The influence of the difference in architectural construction methods of tree planting within the green tract of park and open space on the respective distribution of each meteorological element therein was especially closely evaluated and the following results were obtained.
1) In a summer season, the areas of densely packed trees where the floor of tall and intermediate tall is covered with shrubs or grass show the lowest temperatures and the highest humidity.
2) In a summer season at 10:00, 14:00 and 18:00 the air in the urban area shifts to green tracts in parks close to the built-up area, maintaining a correlation between the weather and the architectural arrangement of trees planted in the circumference of green areas in the park.
3) In the summer, air of lower humidity is present on lawns in green spaces compared with the densely forested areas.
4) On the south-west slope surrounded by an evergreen forest and on a flat lawn area in a general topography of evergreen trees and sunlight a high temperature zone was recognized in winter.
5) In winter when a wind of more than 3m/sec. blows the air over the urban area shifts into green spaces via areas of low tree density regardless of the weather and time of observation.
6) The wind velocity in the forest is conspicuously slowed as compared with open areas but that on the road through the forest is comparatively strong.
7) A lower value of discomfort index is seen in places where shrub and deep grass cover the forest floor among tall and intermediate tall trees or in the neighbourhood of an area with such planted-tree arrangements, as compared with areas with other tree arrangements.
8) A comparison of body sensation temperature in a forested area within green spaces in a park including the influence of the air with that in an open area under a single tree revealed greater comfort with the latter than with the former.

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Ozone causes peculiar injury symptoms to plant leaves, especially for the leaves of woody plants it causes them to change into yellow or red in color at reletivly early date and to fall before their normal maturity. In this report the effect of ozone on nucleic acid and protein, phisologically important components in living cell, was discussed. With the period of ozone exposure increasing nucleic acid and protein began to decompose, and at the time when visible symptom appeared, the rapid loss ofnucleic acid and protein was observed. The quantitative comparison between the nucleic acid, protein, and chlorophyll in senecent leaves and ones damaged by ozone indicated that both resultants were of a similar pattern, that is, a decrease in the contents of nucleic acid, protein, and chlorophyll.
Ozone may affect normal metabolisms and cause a variety of injuries, but as a final result the decomposition was the same as changes generally observes in senecent leaves. In conclusion the author deduced that ozone, a highly active oxidizing compound produced photochemically, causes very rapid the the senecence of the leaves of woody plants.

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Openspace problems are touched upon in consideration of the progress of farmland-renovation in area of remarkably urbanized suburbs, Matsudo-shi. The author classified openspace feature in the following three types.
(1) Green Covered Openspace
(2) Green Equiced Openspace
(3) Facility Attached Openspace
Farmland is a main element of the Green Covered Openspace, and is considered as of fundamental for a planning of openspace and landuse in urban region.
In this research report, the wechan: zme of urban renovation is analized to understand the condition of disintegration of farmland through the following individual investigations resulted in several factors.
(i) Historically backgrounded urban renovation of farmland is strongly influencd by agricultural policies and industrialization policies by the Government, resulted in the real property for farmers.
(ii) Land posessing pattern has changed in period of land re-allocation, in 1947, and the average rates of distribution and division have been increased in their number.
Land disintegration is classifiel into the following two types.
·Landuniting oriented type
·Ownership-transmission oriented type
(iii) Land disintegration feature is distinguished as of spacialization of farmland for urban use, especially for housing estates.
In conclusion, land disintegration in the suburbs is proceedingly developed to invite the negative factors for ideal establishment of farmland, and the openspace sprawl is generated from with in th, agricultural class rather than the power of the city.

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