1.
branch point, fork, junction
A point where a road, path, or river splits into two or more directions.
2.
turning point, watershed moment
A critical point that determines the direction of future developments.
Related Words
Compare:
合流点 (confluence, meeting point)
Related:
十字路 (crossroads)
Compare:
転換点 (turning point)
Compare:
岐路 (crossroads, turning point)