The Frenchman calls up youngster after injuries and suspensions take their toll on the first team, and he feels the Japanese prospect has all the attributes needed to shine
The 18-year-old is one of a number of teenagers, alongside Carl Jenkinson and Alex Oxlade-Chamberlain, who have made the squad for the match against one of the Premier League’s biggest spenders this summer.
Miyaichi joined Arsenal in January, but work permit problems meant he had to go on loan to Feyenoord, where he scored three times and laid on four assists in his 12 appearances.
With his work permit problems now sorted, he is available for selection and his manager declared himself excited by what he has seen of him so far.
"He is in the squad for tomorrow. We are impressed by Ryo’s quality, his spirit and his attitude," Wenger told reporters.
"Everybody is absolutely convinced he will be an Arsenal player. He has a good understanding of the game, he is very quick, he is a fighter and has all the attributes that you love of a player at the top level.
"He is 18 years old and has come from college football straight to professional football so we want to give him time to adapt to the Premier League."
Miyaichi’s inclusion is a bright point for Arsenal, but they are missing a number of first-team players for the weekend.
Wenger added: “We have [Alexander] Song and Gervinho suspended. [Abou] Diaby and [Jack] Wilshere are injured. [Johan] Djourou and [Armand] Traore will not be available and [Kieran] Gibbs will not be available.
“Apart from that, the moral is strong and the belief is strong. I believe we have had a decent start.”
Another player who will not feature against Liverpool is midfielder Tomas Rosicky, who played in Tuesday’s 1-0 win against Udinese, although Wenger said he is expected to return to training next week.
“We will give Tomas a rest tomorrow,” he concluded.
“It is not a bad injury and he should be back with us on Monday but he is rested tomorrow.”