(1) P value of the Night-train can be an index which determines the character of trains and the mutual directional character among the areas. Especially. P1 the number of the passengers at the starting station : the whole passengers) P3 (passengers between the starting and the terminal stations : the number of the passengers at the starting station) and P5 (the number of the passengers between the starting and terminal stations : the whole passengers) ase the index which shows whether the triin is nocturnal or daytime. generally, P1 is shown hign in degree in a Night train. But other values except P1 are various. For example, in the case of the ‘Ise’, its P1=92, P3=6 and P5=1. In the case of the train , P1=92 P =97 and P5 1, and both trains are different in their nature as a Night-train.(2) In the time of the traffic of passengers between Tokyo and Osaka, 1, 271 persons make use of Night-trains while 212 persons take Daytime-trains, This shows the utilization of Night-trains surpass.(3) The Tokai district between Tokyo and Osaka, the Sanyo district between Osaka Kyushu, and the Tohoku district between Tokyo and Hokkaido, these districts are ‘unavailable time zones, ’ These unavailaqle time zones are ‘passage areas’. If these are compsared with the directional asea, they are less powerful as independent districts economically and socially.(4) The Sanyo and Kyushu districts can be reached from Tokyo, Kyoto or Osaka within 24 hours by a Night-train. But the people from Kyoto or Osaka have much available time of sojourn. Consequently, the number of passengers which inclines to there districts differs.(5) Generally speaking, when A and B form a seection and have no other region called C in their further front, even if the distance of the section is 200 km or so, it forms a directional region. But the region called C is important from the economical point of view, and B region becomes a passage area for the purpose of the passenger treffic.(6) The economical value of trains is considered greater in the case of an express and a Night-train. If a city is to have an independent economical power enough to have Night-trains, operating the distance between these cities must be 500km. From the contrary point of view, a populous city near a large city can be called, as it is, a satellite town.(7) The transition from a passage ares to a directional region comes to bring the desire to have Night-trains available, But, if it is limited because of the distance, the stop of a train from midnight to morning, can be considered.(8) The improvement of transportation increases the desire for it, and the increase of the desire promotes the productivity. In my opinion, tsansportation must go a step ahead of production.