
| April 1975 | Joined Japan Radio Co., Ltd. |
|---|---|
| January 1979 | Joined Sony Corporation |
| October 2001 | Representative Director and President, Sony Ericsson Mobile Communications Corporation. |
| April 2003 | CVP, Sony Ericsson Mobile Communications Corporation AB |
| November 2005 | Corporate Executive, SVP, Sony Corporation |
| April 2008 | Corporate Executive, EVP, Sony Corporation |
| April 2009 | Executive Deputy President Officer, Sony Corporation *Mr. Yoshioka has resigned from the office as Executive Deputy President Officer of Sony Corporation as of December 31, 2012. |
| July 2013 | Outside Director, Coca-Cola East Japan Co., Ltd. |
| April 2017 | Outside Director, Coca-Cola Bottlers Japan Inc. |
| January 2018 | Outside Director, Coca-Cola Bottlers Japan Holdings Inc. |
| March 2023 | Outside Director (Audit & Supervisory Committee Member), Coca-Cola Bottlers Japan Holdings Inc. * |