Josh Adams scored a first-half try for Wales.
There are 7 people in the city of Cardiff.
Adams Cons: Tovey.
Toulouse had 39.
Jelonch, Ahki. Ntamack 4 Pens: Ntamack 2
A makeshift side did themselves proud with a spirited display in the loss to Toulouse.
Without 42 players due to injury and suspension, Cardiff took a shock lead with Josh Adams' try.
Anthony Jelonch and Pita Ahki both crossed for Toulouse at the half.
The World Rugby player of the year,Antoine Dupont, created a fourth try for Arthur Bonneval as he added a third try.
The young full-back was sent off for a high tackle on Baptiste Germain, before Joe Tekori scored Toulouse's fifth try.
The defeat was inevitable for Cardiff, but they rose to the challenge admirably, drawing a standing ovation from the Arms Park crowd.
The home fans were vocal in their support. On paper, the resources between the two sides would be much greater.
Toulouse came fully loaded with a stellar line-up which included Romain Ntamack and his France international half-back partner.
32 players were forced to stay in South Africa due to injury and suspension, as well as a further 10 due to illness, in addition to the 10 that were absent from the game.
They had to cobble together a combination of academy and semi-professional players to fulfill the fixture, along with their six Wales internationals who had not traveled to South Africa.
With most of the first-team coaching staff still self-isolating as well, academy boss Gruff Rees was placed in temporary charge of what he described as a group of "misfits" eager to test themselves against the best in Europe.
Olly Robinson, James Botham and captain Ellis Jenkins were the masters of breakdown and they were fearless, defending robustly and forcing turnovers.
The hosts attacked whenever possible, with scrum-half Tomos Williams and wing Dan Fish breaking the game up and increasing the tempo by taking quick-tap penalties, one of which led to the opening try.
The Toulouse defence was turned around by the kick ahead of him and the scrum five metres out from their try line gave the perfect platform for Adams to score.
With 21 minutes played, the team from Wales dared to dream of causing one of the greatest upsets in European club rugby history.
They were brought back down to earth after Toulouse's response.
The scrum-half broke from his own half and slalomed his way towards the Cardiff 22 before passing to Ntamack, who had Jelonch on his shoulder for a simple run-in.
The architect of Toulouse's second try was the man who was in charge of the counter-attack from his own half, and he was the man who broke a tackle from Theo Cabango to score a converted try which put the visitors 20-7 ahead.
The man of the match in this form was not stopped by any team in the world.
The magician scored Toulouse's third try with a vicious fend and sharp finish, before creating their fourth with a cross-field kick which found Bonneval.
It took Toulouse 67 minutes to get their bonus point, but it was a measure of how well Cardiff applied themselves.
The pride of their supporters on what was an uplifting occasion at the Arms Park and the stirring performance of the team were what made the difference.
"We were in the game at certain moments but then you're done by three or four class moments by the world player of the year," said Gruff.
It's been a remarkable effort and I'm happy we put on a good show. We made it scary for them and that's something we can be proud of.
There are so many moments to celebrate. There was a Corinthian spirit about what we did today.
Theo Cabango, Josh Adams, Dan Fish, Olly, Tomos Williams, Alun Lawrence, Will Davies-King, and Rowan Jenkins are all in the squad.
Replacements: Evan Yardley, Joe Cowell, Geraint James, Rhys Anstey, Alex Everett, Ethan Lloyd, and Ryan Wilkins.
Matthis Lebel, Arthur Bonneval, Romaine Ntamack, Antione Dupont, Cyril Baille, Peato Mauvaka, and Thibaud Flament are all from Toulouse.
The replacements are: Rodrigue Neti, Iosefa Tekori,Yannick Youyouette, Baptiste Germain, and Juan Cruz Mallia.
Match officials.
The referee is from England.
The assistant referees are Michael Hudson and John Meredith.
Craig Maxwell-Keys is from England.
