Who am I?

さて、今回は　ホットな話題です。

どんどん解答してください。

I stand close to the border

between two countries.

Recently someone came to buy me

at an incredible high price

but my owner turned it down straight away.

He said, “The price is not so important

but the person who buys it is important.”

Fortunately a person whom my owner regards

as ideal came with the decision

to take care of me.

Soon I might belong to the largest city, Tokyo.