For my second drawing, the Oyashio (SS-511). Took me a while as I am not really familiarized with how things are done, but here it is! I consider it done, however, I'm fully open to new proposals on how to perfect the drawing!
After WW2, Japan was demilitarized, prohibited from having a navy to defend its territorial waters. However, after the Treaty of San Francisco, Japan established the Japanese Maritime Self-Defense Force. Shortly after this, Japan (specifically Kawasaki Heavy Industries) domestically built the Oyashio (SS-511) at Kawasaki Shipyard as a means of restarting domestic development of submarines. Commissioned on the 30th of June 1960 and decommissioned on the 30th of September 1976, the Oyashio had a long 16 year career before eventually being scrapped in March 1977.