The signing announcement by the Liga side is as pragmatic as it is promising, with the 18-year-old set to play in the junior squad before moving up to the senior team
The 18-year-old isn't widely known in his country, but his signing indicates that his talent could be good enough for Indonesia's national team.
"Arthur Irawan is a promising young player from Indonesia who we successfully discovered," Espanyol said in an official statement posted on the club's website.
"He could attract the interest of Manchester United, but his family wanted him to continue his studies."
Irawan's name had come up in relation to the Indonesian U-23 national team selection, but after being considered too young, he was left out of the roster.
He was on track to play for English amateur club Lytham Town before attracting interest from the Spanish side.
According to the announcement, Irawan will spend his first year at Espanyol in the junior team in order to improve his skills and prepare him for the rigours of first-team action.
"Now, the challenge for our coaching team is to be able to make him adapt to the style of football's elite at the European level," club officials elaborated.