- August 2004
DP Inc. is established to plan, develop, and operate mobile and PC-focused content.
- April 2005
Begin operating Daito Giken Inc.'s official mobile site, "Daito Yoshimune City"
- October 2006
Headquarters is relocated to Tokyo, Chiyoda, Kajicho
- November 2011
Release a slot simulator app for smartphones
- November 2012
Begin operating an Android version of Daito Giken Inc.\'s official mobile site, "Daito Yoshimune City"
- June 2013
- Release the social slot app "DonDel"
- September 2013
- Headquarters is relocated to Tokyo, Chuo-ku, Kyobashi
- September 2014
Release of "Scratch Pirates," a social game jointly developed by PAON Inc. and DP Inc.
- March 2015
PAON DP Inc. is formed through a merging of PAON Inc. and DP Inc. Its goal is to deliver the "highest quality entertainment."
- November 2016
- Release the social game app "Alien Egg"
- October 2017
- Release the subscribe slot game service "Daito Yoshimune City"
- December 2017
- Headquarters is relocated to Tokyo, Kita-ku, Tabata