July 2004 | | Rio Law Accountant Office, Judicial Scrivener Hideki Hayashi Office, and Mami Sugiyama Tax Accountant Office start business together, as "Rio Law Accountant Office" |
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January 2007 | | Judicial Scrivener Corporate Rio Partners (Representative then: Hideki Hayashi) founded * The representative as of June 2011 is Hiroaki Ishii. Tax Accountant Corpporate Rio Partners (Representative: Mami Sekine) founded |
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October 2007 | | Changed Office name from Rio Law Accountant Office to Rio Partners SOGO Office |
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June 2008 | | Legal Professional Corporate Rio Partners (representative: Hiroshi Minami & Kenichiro Komiya) founded |