Monthly column by Kosei Wada
President of Ongen Publishing Co., Ltd
- 2018 December
- 2018 November
- 2018 October
- 2018 September
- 2018 August
- 2018 July
- 2018 May
- 2018 April
- 2018 March
- 2018 February
- 2018 January
- Year 2017 Columns
- Year 2016 Columns
- Year 2015 Columns
- Year 2014 Columns
- Year 2013 Columns
- Year 2012 Columns
- Year 2011 Columns
- Year 2010 Columns
- Year 2009 Columns
- Year 2008 Columns
- Year 2007 Columns
- Year 2006 Columns
- Year 2005 Columns
- Year 2004 Columns
- Year 2003 Columns
- Year 2002 Columns
- Year 2001 Columns
