Umihara Kawase Shun ~Second Edition~
PlayStation (SLPS 02549) 20th January, 2000 (publisher: XING) (jp.playstation.com)
Windows PC - 24th November, 2015 (publisher: Agatsuma Entertainment (2015); Degica (2016-)) (Steam)
Umihara Kawase Shun ~Second Edition~ is an updated version of Umihara Kawase Shun, released three years later, at a discounted price and as the first game in publisher XING Entertainment's Maruan Series.
Umihara Kawase Shun ~Second Edition~ contains three new fields - fields 56, 57 and 58. All of the in-game advertisements of Umihara Kawase Shun have been removed and replaced with artwork of Kawase.
If you have any replays saved from Umihara Kawase Shun you will still be able to play them back in ~Second Edition~.
Umihara Kawase Shun ~Second Edition~ Kanzenban was released for Nintendo DS in 2009, including the ~Second Edition~ fields as well as some new fields. In November 2015, Shun was also released for Windows PC through Steam, including the ~Second Edition~ and Kanzenban fields; it was removed from the Steam store on December 31st, following the closure of publisher Agatsuma Entertainment, but was re-released on 5th February, 2016, by new publisher Degica.
Umihara Kawase Shun ~Second Edition~ was released on the PlayStation Network in Japan in 2012, so if you have a Japanese PlayStation Network account, you can buy the game and download it to play on a PSP, PS3 or PS Vita.
For more information not specific to Umihara Kawase Shun ~Second Edition~, please see the Umihara Kawase Shun page.
With thanks to sol-alpha for contributions.