The 19-year-old moves to the DW Stadium in search of first-team action under Roberto Martinez, who may see the Japanese as a replacement for reported Chelsea target Victor Moses
The midfielder spent the end of last season with Bolton, where he played eight times in the Premier League and four in the FA Cup, scoring against Millwall in his second game, after a previous spell in the Eredivisie with Feyenoord.
The 19-year-old had been limited to the Arsenal reserve team, with occasional League Cup action, before he made the four-month loan last term and Arsene Wenger has decided that a first-team spot will be hard to come by once more therefore opting to give the player a chance to make an impact at the DW Stadium.
A statement on the club's official website said: "Ryo heads to the DW Stadium to gain further first-team experience under Roberto Martinez.
|7.00||Wigan are 7.00 with bet365 to beat Chelsea on the opening day of the season|
"Everyone at Arsenal Football Club wishes Ryo the best of luck during his time with Wigan."
The Japanese forward, who made his full international debut against Azerbaijan in May, will help to bolster Martinez's front-line after the Spaniard allowed Hugo Rodallega to move to Fulham, with reports also suggesting the deal could signal Victor Moses' transfer to Chelsea is close.
The Gunners man joins striker Mauro Boselli, signed from Estudiantes, and former Mallorca defender Ramis as the names on their way to the Latics as they look to kick-off the new Premier League season with a daunting opening fixture at home to Chelsea.