The basic data for this study are the statistics of the diversion of the registered landuse. The land diverted from arable to urban use will hereafter be referred to as diverted land. The area of diverted land is shown in maps by each “Koaza” - the smallest settlement unit. The whole area under survey is divided into 21 units according to the former village boundaries before the amalgamation. Then the trends are analysed concerning the area of diverted land per unit region, and to the objects to which the land was diverted. Where the coastal terrace of this district is the widest, there are several factories of Hitachi Co., and two built-up areas called “Hitachi” and “Taga” . A little apart from Hitachi and Taga, there are large areas of diverted land. And outwards from this concentration, the diverted land decreases gradually. Around the railroad stations in this region, there are other isolated groups of diverted land.
In some case, the groups of diverted land are used for residence, commerce and manufacturing industry within the some groups. Such multiple utilization means that an urbanized region is grouping there into a new center of urban life.
In another group of the diverted land, the land is chiefly used either for residence or for factories. In this case, the landuse is mainly for one side of the city functions.
The northern suburbs of “Hitachi” are still quite rural, but a rapid growth of urban area is anticipated here, because there is a big factory near Ogitsu station. Between Hitachi and Ogitsu, many housings for rent are under construction under the subsidy of local governments.
In the diversion from arable to urban land, the Hitachi built-up area and the Hitachi Co. played the leading parts. Their influences spread in concentric circles, which also was modified by the influence of Taga and other regions, as well as the influence of several enterprises in Tokyo with their branches in Hitachi. The municipal authorities of Hitachi City have also modified these areal patterns.

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The working development plannings of Sendai-Shiogama region are : Specified Areas Development Program and New Industrial Centers Program. The former chiefly aims at the arrangement of the conditions for industrial location. The main objective of the latter is to arrange the conditions for the building of a seaside manufacturing region as the greatest economical base of the Tohoku District. The materialization of these plannings is to be done along the line of national development plannings.
One of the aims of Sendai-Shiogama development plannings is to build a new big manufacturing region, in which both the city of Sendai and the seaport of Shiogama are incorporated. On the other hand, according to the New Industrial Centers Program, a new port, the Sendai Harbor will be constructed. Thus the importance of this area will be emphasized as a manufacturing area, and as a base for whole Tohoku District. It is rooted in the geographical potential of the region which will be called to life in the light of modern development planning.

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The temperature of irrigation water is one of the most important factors which influence the productivity of rice-field in Northeast Japan. Lately, some experimental or theoretical studies on it have been carried out, but observations in field are very few. Following the previous paper¹⁾, this is a report on the water temperatures of some irrigation water-ways at the foot of Mt. Bandai and in the Yonezawa Basin. Observation was made on July 12th, 16th and 17th, 1955. The following are pointed out through the observations in the four districts.
1. There are marked differences of water temperature in the water-ways. Such are due to the difference of their sources, whether it is mountain torrent, long trunk water-way, spring at an end of alluvial fan, or river and storage dam.
2. From the rising rate of water temperature (the value raised per 1 km of flow), it seems that the ground water and the earth temperature along water-way are the important factors that influence water temperature, together with air temperature and isolation. Most of water-ways are open ditches without concreat walls and bottoms, and therefore the above-mentioned factors are closely related to the depth of water-ways and the surface landforms through which the water-ways run.

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In the Tsugawa Basin, Niigata Prefecture, there are several levels of river terraces along the course of the Agano and the Tokonami Rivers.
The terraces along the Tokonami River are classified into three groups; the higher, the middle and the lower terraces. The terrace surfaces are generally covered with the veneers of thin gravel beds. There is a remarkable pattern of the river course, and an asymmetrical distribution is seen as to the terraces. These characteristics are the results of the influence of the geological structure.
In the course of the Agano River the author classifies the terraces into three groups; the higher, the middle and the lower terraces. The surfaces of the lower terraces are subdivided into two groups; the upper and the lower surfaces. The upper surfaces are covered with pumiceous materials ejected from the Numazawa Volcano and transported by the Tadami and the Agano Rivers. The pumiceous materials are accumulated on the old river floor with the narrow gorges as its temporary base-levels as seen in the Tadami River and the upper course of the Agano River. A part of the upper surfaces was dissected soon after the accumulation, and by this dissection the lower surface was formed.

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The Tsugaru Peninsula, in the northernmost of Tohoku region is characterized by the development of several marine terraces. The author has studied this area since 1959, and in this paper, he discussed on these terraces and the earth movements of this district.
The followings are the conclusion : a) these marine terraces are classified into 8, and are correlated with those of the Shimokita peninsula (Table 1), b) it is recognized that the peninsula once had undergone a tilting movement from south to north (Fig. 5), and in the Tsugaru alluvial plain, there is an NNW-SSE down-warping movement (Fig. 7), c) location and development of marine terraces in this terrain have a close connection with geological structure.

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