Feature: The history of submarine built after WWII in our country will be reviewed from a technical standpoint.
Abstract: [the Japanese Navy] JMSDF has built about 50 submarines from the first Oyashio-class [a one submarine “class” SS-511, Laid down December 1957] which was [Japan’s first post war domestically built] submarine to the latest Soryu-class.
Our submarines have continuously evolved depending on the operation aspects, considering request of operators [Japanese Navy customer] and taking in latest technology. The direction of this evolution can be expressed as “stronger”, “longer” and “more silent”.
[On the Relatively Short Operational Life of Japanese Submarines]
“Many people think short commission period of Japanese submarine is due to its short life time caused by degradation, fatigue, corrosion, and so on. But they are perfectly wrong, the short commission period results from require for continuous evolution.
S (with some further translation and links by Pete)