The 17-year-old winger has made his breakthrough with Granada this season, scoring once in six Segunda División appearances.
His emergence has quickly attracted attention beyond Spain, with Gazzetta dello Sport recently reporting interest from Real Madrid and Milan.
Emeka is contracted to Granada until the summer of 2031 and is understood to have a release clause worth €15m.
The teenager has now been added to Arsenal's list of potential targets, according to journalist Matteo Moretto.
English clubs Newcastle United and Everton are also reportedly interested in the young attacker.
Emeka has made his first steps into senior football at Granada after progressing into the club's first team at just 17.
His early involvement has put him on the radar of several clubs, with the interest from Arsenal adding another major name to the growing list of potential suitors.
Granada's long-term contract with the winger provides the Spanish club with significant protection over his future. Any interested club would therefore have to negotiate a substantial deal if it wanted to take him away from the Segunda División side.
Real Madrid and Milan were among the first major clubs linked with Emeka, but Arsenal's reported interest means the competition for his signature is growing.
Newcastle and Everton are also monitoring the situation, according to the reports supplied.
For now, Emeka remains a Granada player and his immediate focus is on establishing himself in senior football.
His progress will continue to attract attention, particularly given his age and the length of his contract, while the reported release clause underlines Granada's desire to retain control of his future.
The next stage of Emeka's development will be closely watched as the teenage winger continues his first full campaign at senior level. For Granada, keeping hold of the teenager will now be a priority as his profile continues to grow.