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rod; pole
neck (of a shamisen, etc.); shamisen
beam (i.e. the crossbar of a balance)
single line (esp. as a flying formation for geese)
penis
counter for flags (on poles); counter for long, thin Japanese sweets (e.g. yōkan)
物干し竿を設置しました。
I installed a clothes-drying pole.
天秤の竿が平衡を保っています。
The balance beam maintains equilibrium.
釣り竿を持って川に行きました。
I went to the river with a fishing rod.