Ryoichi Ohno, attorney-at-law and a divorce settlement
This scam is a variation on the usual "divorce settlement" scam in that the scammer pretends to be a lawyer for a Japanese law firm. The South Toranomon Law Offices do exist, but they use their own email system rather than the yahoo.com preferred by "Ryoichi Ohno".
From: South Toranomon Law Offices <email@example.com>
Subject: Divorce Settlement
I have a divorce settlement in your jurisdiction let me know if you can help to discuss this further because of the time difference between Asia and Yours we prefer communication via email.
I awaits your reply
South Toranomon Law Offices
Japan Gas Ass'n Building, Suite 500
1-15-12 Toranomon, Minato-ku
Tokyo 105-0001 Japan