For the basic play learn japanese is not needed i have made near 70 missions without understoud a word lol , but for the upgrades on the mechas :'( it is the hell
For the save when you are at the map screen it is start and you need to select the characters at the top , at the main menu the bouton at the top is start a new game and the bouton at the bottom is load game.The meaning of th missions is not very hard at understoot , after some tries it is doneÂ
the circles on the map are for the missions
the cubes are for the speetch
the greens stars are for the shops
the red star (the top )is i think the main général quarter of the characters when you dont have a new place to go gon on it (but don t skip the text or it won t work)
to win money you need to made the missions , you can made one 4 times with the 4 dificulty