 Although the opening round of the 1990 World Sportscar Championship season was held at Suzuka Circuit in Japan, the new R90CKs intended for the series would not be completed in time for the event, leaving the previous Nissan R89Cs to be run by the European team.A lone JSPC R90CP was run by the Japanese team but did not finish.By the second round of the season at Monza, the first three R90CK chassis would be completed with Northern Ireland man Kenny Acheson and Brits Julian Bailey and Mark Blundell joining Italian Gianfranco Brancatelli as the driving line-up.