noun
same plan; same idea
Used when two or more people independently have the same plan or idea. Often appears in phrases like 同案である or 同案が出る.
彼と私は同案だった。
He and I had the same idea.
会議で同案が出た。
The same plan was proposed at the meeting.
noun
that plan; that idea
Refers to a previously mentioned plan or idea. The context must make the referent clear.
同案には賛成できない。
I cannot agree with that plan.
同案についてもう一度検討しましょう。
Let's reconsider that idea once more.