This paper consists of two parts: one of them treats about investigation concerning the topographical and geological features of coast which have an influence on the expenses (the expenses include those of the reclaimed land required for a factory) when a factory is newly established on the coast-lands. The other treats of the arrangement project of a factory considered from the point of topographical and geological situation, taking the case of the northern coast of Ise Province centering in Nagoya and Yokkaichi cities.
It is needless to say that the important condition in the extension for coastal factory site is the depth of water in the projected land of reclamation. Difference of one meter deep bring about difference of 180-200 yen per 1m² of the reclaimed land-The expenses include the increase of various expenses according as the depth of water increases-.
From this point of view, delta lands where the depth of water is small among the coastal land, is the most suitable and profitable place for the extension of reclaimed land.
As regards delta lands of the big rivers, however, the base of alluvial layer is deep on account of the fact that they are situated just on the submerged valley of the last ice-epoch. Load carrying capacity more than 30-50ton/m², consequently, can not be expected if it is not less than 30-40 meter deep from the land surface. Such being the case, the expenses of industry that stands in need of weighty equipment run up for the foundation work. There sometime is the case when no margin of profit cannot be turned out as construction land of factories. On the coastal diluvial plateau and the younger tertiary hilly land in Tokyo and Ise Bays, deposited platforms extend in several places, as for as the offshore of about 2km from the present coastline.
These places are 2-3m deep, and moreover load carrying capacity of not less than 50-100ton/m² is gotten in the place of less than 10m deep. These lands may be said to be the most suitable place for the location of factory that is in need of weighty equipment.It is not always enough, with regard to the location of mainstay factories: iron works and petroleum refinery, etc., even though topographical and geological condition is suitable for these factories. The expansion of land where it is possible to establish the correlated factory group and the industrial combination around the mainstay factories and to use the products and by-products of the mainstay factories there, has to be provided.
The northern foreshore of Ise Bay which has a potential land to be reclamied from the sea not less than 50, 000km² has a expectation of future as a coast-industrial district. The author came to the conclusion, as respects arrangement of factory, that the factory had better locate factories of the group of heavy-chemical industry which surround iron-works on the part of deposited platform on one hand, and the group of correlated factory and light industry on the delta lands on the other.

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Tamano City of Okayama Prefecture, as a case of studies in industrial area, is treated here. The city is a mono-industrial city centering at Mitsui ship-building yard and grew up through it. To begin with, it unexpectedly began to show germination of growth as a local city since Mitsui ship-building yard was established in March of Taisho 8 (1919); though habitants of this area had been engaged in farming and fishing, by that time, by using limited plain and its back hilly land of granite on the Inland Sea of Seto. Main factor in the location of ship-building yard seems to have been various economic conditions that based on the policy of management in Mitsui Capital, and the natural and cultural conditions in this region. After that, in accordance with the changes of international and internal economic situation, prosperity and decay in turn had successively occurred according to the growth of ship-building. These situations also were related directly to the growth of Tamano city. Peculiarities of production structure that ship-building had in itself, soon became to reflect on Tamano mono-industrial city just as it was. Houses of workers were built up, and having these dwelling houses as their object, some shopping streets were formed, for many work-men were gathered around the village which was once out-of-the-way. And then, road-repairing and road-project were so smoothly and rapidly performed that the land features were in comparatively a short time changed village into town, town into city. With the progress of settlement, a bigger change was seen on the interior structure. Among the present population of 60, 000, for instance, ten per cents of the population are exployed in this ship-building yard. Bearing this fact in mind, you can easily understand that this city forms a close relation with ship-building business.
If you consider the relations of all the kinds of correlated and subcontract industries and temporary workers and out-side workers characteristic in ship-bluilding, this relations will be more emphaticaly recongized. Prosperity and depression of ship-building business immediately mean those of Tamano city itself. Well, in the case of such mono-industrial city, there are also many faults exist for its too much acute reliance on ship-building: for good examples, the growth of correlated industries is stagnant, and the classification of labor structure in the ship-building makes its appearance in the order of civic social life as it is etc. In Japan, it is not too much to say that most of the local industrial cities have more or less similar phenomena. The author considers that these kinds of studies have to be made more actively, for the regional structure in Japanese industry must be more widely understood.

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Woolen yarn manufacture in Japan owes its origin to the government-managed Senju Carpet Mill which was established in 1879. Woolen spinning factory could scarcely be seen except for the factories where some leading traders combined woolen yarn spinning with woolen textile factory, with the purpose of yarn selfsufficiency, because the early woolen industry had laid the foundaion of market mostly on woolen textiles.
Constequently the location also depended on woolen textiles, and not only location but also demand had been set within the limits of two districts, that is, Keihin and Hanshin districts at that time which had been the base and center of capital in the early woolen industry.
When the twentieth century began, on the other hand, medium and small woolen textile industry, that had used the imported woolen yarn as raw materials and produced mere woven goods, sprang up: the northern Bisai and Tsushima, etc. of traditional cotton textile areas in Aichi prefecture succeeded in commercialization of “Kijaku Serges” (Serges for Japanease clothe's sake), traders concerned began to change their cotton textile productions into the “Kijaku Serges” productions in rapid succession. And then, these areas were gradually characterized by woolen textile lands, together with the adjustment of the consolidated technique. These areas took the opportunity to find manufactures of Western clothes by the leadership and encouragement of Western draper's traders in Osaka, at the time when importation of woolen textile was stopped during World War I. In the meantime, this place became one of the largest woolen textile area in Japan, and the monopolistic medium and small woolen textile area has been gradually formed since about 1930 so far as Western clothes are concerned. Such formation of a larger woolen yarn market in Japan (it was encouraged by the increase of import-customs duties) and the maldistribution in the northern part in Aichi prefecture-localization of market-was possible to promote the full-scale growth of woolen yarn spinning industry which aimed chiefly at manufacturing woolen yarn as merchandise. The above-mentioned fact may be said to be one of the greatest factor of accumulation of woolen yarn spinning mill in this district was active in 1930's, especially about 1935, though it was acted already since 1920's. Many of them had been closely connected with the medium and small woolen textile industry in Aichi prefecture. Fundamentally, the postwar accumulation has also a tendency to the same character.
Woolen yarn spinning is one of water type-industry, too. In this respect, there was no difficult problem on the Nobi and the Ise plains (especially in prewar times).
In case of the spinning from top-making which used import-wool as raw materials was managed, it became a problem whether marine transportation is convenient or not.
As reconstruction works of Nagoya and Yokkaichi harbours were continued from 1920's to 1930's, however, they were equipped completely for the use of ocean line vessels. These respects are also considered essential factors that promoted the accumulation of woolen yarn spinning industry in the Tokai district.

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