The Dutch took the lead in the ninth minute when Bryan Brobbey converted from close range after his side got down the right flank.
Irish keeper Harry Halwax made an impressive stop to deny Ryan Gravenberch in the 12th minute then Ireland had the home defence worried on occasion through Troy Parrott, Brandon Holt and Armstrong Okoflex.
Brobbey got his second goal in the 27th minute when he ran onto a ball over the top and poked the ball past the advancing Halwax for a soft finish.
Belvedere striker Parrott found the net for Jason Donohue’s side in the 29th minute after Holt's free from right was headed goalwards by Okoflex and Parrott turned home the rebound off the Dutch keeper.
Okoflex was denied an equaliser by keeper Rutger Bax after good work by Parrott three minutes later but unfortunately the Irish conceded a penalty in the 40th minute to go in 3-1 down at the break.
Parrott then hit the post with a decent effort in the 48th minute and the Irish thought the ball had crossed the line before it eventually went out on the opposite side of the goal.
Brobbey got his hat-trick in the 62nd minute after intercepting a poor Irish clearance and it was 5-1 in the 65th minute when Melayro Bogarde headed hjome from a corner.
The sides will meet again at the same venue on Thursday.
REPUBLIC OF IRELAND: Harry Halwax; Seamus Keogh, James Furlong, Timi Sobowale, Cian Kelly, Joe Hodge, Sean Kennedy, Brandon Holt, Troy Parrott, Armstrong Okoflex, Jack Funge.
Subs: Sean McEvoy for Funge 55 mins; Ayodeji Sodona for Holt 60; Matthew Healy, Festy Ebosele, Aaron Davis, Conor Carty, Cian Leavy
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Ireland U15s draw with Netherlands in friendly
Manchester United youngster Ayodeji Sotona put the Irish in front very early on and although the Dutch levelled with a fortunate first half equaliser, Irish coach Jason Donohue was pleased with the overall display his young side produced.
Ireland took the lead in the fifth minute when Troy Parrott made a powerful run down the right wing and sent the ball across goal for Dublin-born Sotona to slot home from 10 yards out.
Irish keeper Aaron Davis made a decent save to keep out a Dutch header in the 15th minute before the Netherlands levelled in the 17th minute with a fortunate effort that saw a right wing cross end up in the Irish net via the opposite upright.
Cian Leavy had a chance to restore Ireland’s lead in the 37th minute after connecting with a cut back from Parrott but a defender cleared off the line.
Parrott has a shot over in the 45th minute then had a headed effort just off target in the 59th minute as Ireland pushed to extend their lead.
Davis made a decent save in a one on one situation in the 70th minute then the home side had a player sent off for a foul on Ireland substitute Festy Ebosele with nine minutes left.
Parrott almost snatched a victory for the Irish in injury-time but the Dutch keeper made a decent save.
“We reflected on the first game and spoke about not making the same basic defensive errors so we defended a little deeper.
“After we took the lead, it was tight enough and they equalised. After that were unlucky not to go ahead again. When we looked back on Tuesday we weren’t actually that bad but you can’t get away with the errors we made.
“We created more chances in the first game but we looked a stronger unit in the second game and overall I feel we met our objectives here this week. We’ll look forward to our next fixtures against the Czech Republic in April.”
REPUBLIC OF IRELAND: Aaron Davis, Seamus Keogh, Cian Kelly, Sean McEvoy, Jack Funge, Cian Leavy, Joe Hodge, Sean Kennedy, Brandon Holt, Troy Parrott, Ayodeji Sotona.
Subs: Conor Carthy for Leavy 41 mins; Matthew Healy for Sotana 41; Festy Ebosele, for Kennedy 65; Timi Sobowale for McEvoy 73. Unused: Harry Halwax, James Furlong, Armstrong Okoflex.