All seven Irish boats completed the full 12-race series at the European Laser Olympic qualification regatta in Vilamoura, Portugal on Saturday.
Irish hopes of securing a third boat for the Tokyo Games were ended on Friday when Finn Lynch fell short.
Ireland still has two other boats qualified for Tokyo: Annalise Murphy (National YC) in the women's single-handed event and Robert Dickson (Howth YC) with Sean Waddilove (Skerries Sailing Club) in the men’s skiff event.
Lynch competed in the final two races of the Gold fleet on Saturday and finished in 33rd place overall following a 14th and 42nd.
Germany’s Philipp Buhl, the reigning world champion, delivered a thrilling finish to the series, edging out Brazil’s five-times Olympic medallist Robert Scheidt by a single point in the big swell finale.
Spain and the Netherlands won the two Olympic nation places for Tokyo.
Ewan McMahon from Howth YC improved to 48th overall with a 23rd and 55th for the day. Liam McGlynn of Ballyholme YC also picked up places to 56th in the 70-boat gold fleet.
In the men’s event silver fleet, newcomers to senior level racing Tom Higgins and Hugo Kennedy, both of the Royal St George YC in Dun Laoghaire, placed 46th and 62nd respectively.
Meanwhile, Olympic silver medallist Murphy put the disappointment of missing gold fleet behind by delivering four consecutive race win 'bullets’ in the radial silver fleet to win the classification.
Aoife Hopkins and Eve McMahon, both of Howth YC finished sixth and ninth respectively in the 44-boat silver fleet.