Nippu Jiji, 1939.12.07, p. 9
Europe 47 sets sail
One of 6,000 merchant ships in service at start of WWII: https://www.amazon.com/Worlds-Merchant-Fleets-1939-Particulars/dp/1861762933
箱根丸
The nomenclature of the N.Y.K. fleet by Fane, Richard Ponsonby (1931) via Internet Archive
"The New NYK Steamers." The Far Eastern Review July 1922