According to the site, the game will be announced at Shogakukan's Ciao Summer Festival, which takes place July 28. Siliconera reports that Cooking Mama spin-off, Gardening Mama: Mama and the Forest Friends, will also be displayed at the event.
Cooking Mama 5 will reportedly launch in Japan this winter. The series' last entry, Cooking Mama 4: Kitchen Magic, was released for Nintendo 3DS in 2011.
We have contacted Majesco Entertainment for comment and will update accordingly.