1980	EDA business is started.
1982	VLSI Design System SX-8000 is released.
1990	ULSI Design System SX-9000 is released.
2002	New layout system Alpha-SX is released.
2004	Jedat Inc. is established. Jedat takes over the EDA business of Seiko Instruments Inc.
2005	Jedat China Software Inc. is established in China.
2007	Jedat Inc. is listed on the JASDAQ Market (code: 3841). A-Solutions Inc. handling analog IP is established.
2009	Jedat Inc. is relocated to Nihonbashi Ningyo-cho, Chuo-ku, Tokyo its headquarter.
2010	As the JASDAQ Securities Exchange and Osaka Securities Exchange are amalgamated, Jedat Inc. is listed on JASDAQ market of Osaka Securities Exchange.
2011	Jedat Inc. is relocated to Higashi-Nihonbashi, Chuo-ku, Tokyo its headquarter.