In the first section of this paper, the Author describes the state of shipbuilding in recent several years in this country concerning the general outline and tendency of new ships built during the period, the development of Home made propelling and auxiliary Diesel machineries and various deck machineries; he points out building of Naval auxiliary vessels at Private yards protected this industry from pronounced depression, and ship and engine repairing business has exerted a great influence on the business of leading firms, he also explains outlook of the modern problem of rationalisation of shipbuilding industry in Japan.
In the latter section of the paper, the Author proposes a reform measure of mercantile fleet replacing the old aged ships with new and economical ones, he also recommends the stabilization of the building schemes of new vessels in order to keep up the least annual capacity of shipbuilding in this country in future; he draws attention ta building of ships under special service so far necessary as developing the other auxiliary important industries. He gives a warning to whom concerned with the shipbuilding industry to get out the crisis and warns of the influence of the latest progress of engineering in both theoretical and practical sides.
In the last, there gives a short description about the development of air craft.