South Kanto industrial Zone, which developes around Tokyo, is divided into “East suburban industrial ligion” and “Kei-hin (Tokyo-Yokohama) industrial region”. Both are comblex industrial regions, but the former is old in origin and narrow in area, so the authors have treated the southern half of the region (Bokuto region) as an example of a complex industrial region. In the East suburban industrial region the factories of small or middle scale are crowded very densely, and the mobern factories of great scale are sittuaged on its marginal area. This is also the characteristics recognized in almost all industrial zones of Japan. Bokuto industrial region is divided into what is shown in Fig. 8, and its character is of the combination read in Fig. 7 : that is, the complex industrial area combined by the self-nurbisheousness of metallic ware industries as its center. By this analysis of complex industrial region it is distinctly recongnized that- (1) the location factors of factories, which is small or middle scale and densely crowed, are the industrial region itself (than is self-nurbishous) or the combination of industries in its region, on the contrary the factories of great scale stand by consideration of economic conditions : (2) the location factors of factories, of industries, and industrial regions are different.

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Aizu Basin extends about 12 km from cast to west, about 32km from north to south in the southern part of the Tohoku district and there are hilly mountains around the basin, except Nekoma Volcano toward the north-east. The results of the local climatological investigation which was excuted July 11, 1950 in the basin are the following. (1) The eight observatories were distributed on ridges between rice fields of the contral-southern part of the basin. There, temoerature, humidity and wind direction at 150cm above the earth were observed at five minute intervals from 4 ^Hoo to 19 ^Hoo.
(2) A valley inversion distribution of temperature hat existed till 7 ^Hoo and its maximum range was 1.7 c. The distribution at the time of maximum temperature (13^Hoo-14^Hoo) was normal and its range was 3.5 c. (Fif. I 1-5, Fig. II 7-8) (3) Therefore, the maximum of the diurnal range of temperature was 12.7 c at the lowest place (175m above the sea) and the minimum was 8.7 c at the highest place (220m). Thought the range of elevation is below 50m, the diurnal variation fo temperature distribution as in lieated with an inclined plane at the bottom of the basin clearly shows the climatological character of the basin. (Fig. II 7-8) (4) On the relative humidity, the three observatories, (Omura, Shojo, Kanamichi) registered a high humidity of over 95% all day long and showed an abnormal diurnal variation in comparison with the other five ovservatories. Moreo-over, on the tension of aqu vap the same phenomenon appeared. (Fig. I 6-10, Fig. II 1-6)
A north wind prevailed in the morning and a south wind in the afternoon. The observatories to the leeward registered a high humidity, always a higher humidity than those to the windward. The author assumed the existence of an abnormal high humidity due to the fact above mentioned, but its cause was not accounted for. (6) The area in which “Imochi” (a sort of harmful insects of a rich-plant) had appeared and caused much damage from the first to the end of july, 1950, had been limited to the central-southern part of the basin. The existence of a high humidity migyt have been one of the causes of this occurrence. (7) According to the frequency map of wind direction, its tendency on every place was not clear. The places which were relatively influenced with a landform were Omura, Kanamichi and Asou. The fact that the direction of the wind was to the south or to the north in the central part of the basin, may be owing to the shape of the bottom of basin. (Fig. II 7)

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