The Kanto Plain, in the central part of which Tokyo is situated, is the largest in Japan. This plain is built by the Quaternary series, marine, fluvial and eolian deposits which are considered to be standard series of the Japanese Quaternary.
In this paper, first, the author summarized the previous studies on volcanic ash layers, the so-called “Kanto Loam”, which covered almost all of terrce surfaces of the Kantô Plain, then tried to obtain chronological relationships between all of the volcanic ash layers. In the southern Kanto, the Kanto Loam, a part of which is derived from Mt.Fuji, is divided into four beds, and in the northern Kant, that is derived from Mt. Asama and other many volcanoes, into three or four beds. To correlate volcanic ash beds with each other, it is quite effective to trace the characteristic layers such as pumice, scoria or buried soil beds, and also the heavy mineral compositions of the volcanic ashes (Figs. 2 and 3).
Secondly, he described the characteristics of landform surfaces in the plain, and chronological horizon of all of them mainly by using relationships between landform surfaces and the volcanic ash beds (Fig. 8). From the a hove mentioned studies, the five stages of landform surfaces, A(Hollocene in age), Du I (upper most Pleistocene), Du b, Dula, and Dl I (middle or Lower Pleistocene), could be classified accordingly.
Thirdly, the palaeogeographical maps of each stage of land form surfaces were illustrated (Fig.9) and the evolution of landform of the Kantô Plain was explaind. As can be seen palaeogeographical maps transgression and regression came into being alternately in the Kantô Plain. The landform evolution of the Kantô Plain was, therefore, mainly caused by these transgressions and regressions, but the distribution and the shapes of the landform surfaces were greatly contorolled by the crustal movements in this region since the middle Pleistocene. Broadly speaking, the plain is a large depositional basin surrounded by up-warped belts, in which the southern hilly land shows the greatest upheaval to more than 300 meters since the middle Pleistocene. But precisely speking, there are three down-warped besins. Of the three, the largest one is in the northern part of the Kanto Plain, the second is located in the south-western part and the third is in the Tokyo Bay.

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In the present article, the writer studies some characteristics of annual and seasonal maximum daily precipitation.
First, the frequency distributions of the maximum daily precipitation are assumed to be expressed by Gumbel's exteme distribution function (Fisher-Tippett distribution function),
Q(x)=exp(-e^-a(x-b))
Applying this theory, the annual and seasonal maximum daily precipitations for 5, 10, 25, 50, and 100 year's return periods are estimated respectively at about fifty stations in Japan. The geographical.
distributions of the maximum daily precipitation are shown for each period (Fig. 1). There are some differences in the pattern of the distributions for each period. In the June-July period, the Bai-u period, the largest amount is found in the southern part of Japan decreasing gradually toward the north. In the August-November period, the typhoon period, large values are characteristic of the Pacific coast area, especially the regions which are exposed to the humid southeasterly winds originating in the frontal side of the typhoon area, such as the Kanto Plain, the southeast part of the Kii peninsula and the plains of east Kyusyu. Distribution of the extreme values of annual maxima is also similar to the August-Novernber period. This similarity means that the precipitations with large amount are brought frequently by the tropical cyclones.
Second, the secular changes of the annual and seasonal maximum daily precipitation are examind for the last fifty years. By the ten-years moving average, the trend curves are drawn for each period and station (Fig. 2). The Gumbel's theoryemay be appiicable, because the secular changes are not generally so remarkable. However, the following tendencies are found: many stations show an in creasing tendency in the June-July period, while some stations, especially on the Pacific coast, show an decreasing tendency in the December-May period.

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The distribution of major industries can not adequately be explained in terms of plant number, labor strength, output, or industrial population. Plants belonging to the same enterprise can not be counted separately as an independent production unit since they constitute an integral whole. Nor has been made any attempt to illustrate the economic structure of a nation in terms of the volume of capital employed by various enterprises.
The object of this article is to show the distribution of Japanese economic actvities by calculating the production capacity of plants of major industries on the basis of added value. The term of added value as used in this article means the value obtained as the result of division of the net incomes of key industries by workmen involved. The investigation covers 106 companies among 112, engaged in commercial production whose of 106 companies capital was over one billion Yen as of October 1, 1955. Total factories are 663 in number. Table 1 shows the pyramidal structure of our economy in each important industrial area. AA indicates such enterprises as have an annual added value of two billion Yen and over ; A stands for those having one billion Yen ; C one quarter billion ; D one hundred million, and E less than one hundred million Yen. Table 2 covers the textile industry only.
A. Classification by industries. 1) The center of the textile industry is the Nobi District. This industry is characterized by its low labor productivity per head and most of textile plants are operated on a small scale.
2) No small number of electric machinery production plants are found inland areas unlike other key industries.
3) Plants producing chemicals, cement, and paper are mostly located in town districts with small exceptions which are operating in a remote place on account of easy access to raw materials and fuels.
B. Location. 1) Tokyo and Osaka provide a very large market for production industries. With the rapid industrial expansion of this country, these two conurbation areas have become to obtain large industrial belts outside of its metropolitan district, for instance, Kawasaki, Yokohama, Amagasaki and Kobe.
2) The Nobi District with Nagoya as its center is conspicuous with a great number of small textile mills scattered over Aichi, Mie and Gifu prefectures and heavy chemical industries Nagoya, Yokkaichi, and Koromo.
3) Hitachi, Takaoka, Niihama, Sakaide, Aioi, Kurashiki, Mihara, Otake, Iwakuni, Hikari, Kudamatsu, Ube, Kammon-area, Omuda and Nagasaki are cities taken their present forms as the result of the development of one or two enterprises existing therein.
4) 15 prefectures have less than two plants of “C” class business scale. Yamagata, Gumma, Ishikawa and Fukui prefectures have no production plants to speak of. As shown above, major industries are mostly concentrated around large cities.

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