kōka kaiyū
1. downstream migration
Noun
#512085
1. downstream migration
1. river; stream
2. River; the ... river
1. side (of something, or taking someone's side); part
2. (watch) case
1. leather
1. poor; pitiable
1. down-train; train heading toward the ending point of its route
2. down-slope; downward going
+ 2 additional meanings1. mountain stream
1. to descend (e.g. a mountain); to go down
2. to alight (e.g. from bus); to get off
+ 4 additional meanings