There is a trainer to this game cerxer it is in japanese though but it's not difficult to figure out.
I made it to the new game+ without using it the game is enjoyable to me.
WARNING I did not use it myself other than to change the gold values I like it little easier but not ruin the gaming experience.
I uploaded it to MF because I got it from a japanese website.
Free Cloud Storage - MediaFire
https://www.virustotal.com/file/fdb373d4515d297558f9ab60f5e478d2eebc0253df60c5b1d07fd15d79ad545b/analysis/ (those that don't trust the link I guess)
I will quickly explain how to use the simple things:
The bottom 3 buttons are : "get current value" "change value to" "confirm" in that order
The 1st tab is gold
2nd tab is stats of the current characters (useable in battle, changes are temporary)
3rd lets you get all the character statistics (useable anywhere, changes are permanent until you level)
4th tab contains consumables mats and furniture (note: you can get all the items even if you never got them before)
5th tab is weapon and accessories
6th don't worry about that one
say thanks and click like if you like it,it is not made by me though.