Everyone agrees the takeover battle for the Japanese owner of 7-Eleven is a watershed moment that could prove the Tokyo market is now open to foreign acquirers.

But for that to happen, the fate of Seven & I Holdings should be determined by the price of any bid, not the politics. And the convenience store operator needs to mount a defense that pushes Canadian suitor Alimentation Couche-Tard Inc. to pay up.

If it really wants to, it can.