Locate a brokerage company that is a licensed member of the Tokyo Stock Exchange. Generally, the larger a brokerage is, the more likely it is that they will be affiliated with the major world stock exchanges.
Open a trading account with the firm and deposit funds into your trading account. Make sure your understand the risks associated with investing.
Place an order to buy shares of Nintendo. Its symbol is NTDOY. Your stock broker will forward this information to a member of the Tokyo Stock Exchange to complete the transaction. There may be a waiting period for the request, depending on your time zone.