The Collaborative International Dictionary of English v.0.48:
Japan current \Japan current\
A branch of the equatorial current of the Pacific, washing
the eastern coast of Formosa and thence flowing northeastward
past Japan and merging into the easterly drift of the North
Pacific; -- called also Kuro-Siwo, or Black Stream, in
allusion to the deep blue of its water. It is similar in may
ways to the Gulf Stream.
[Webster 1913 Suppl.]
The Collaborative International Dictionary of English v.0.48:
Kuro-Siwo \Ku"ro-Siwo\, n. [Jap. kuroshio; kuro black + shio
tide.]
See Japan Current, above.
[Webster 1913 Suppl.]