I agree, that either Material Storage, and everything else that costs SG, should decrease in price, or dramatically increase the amount of SG that's able to be earned in NA. Since NA has a lot more items that cost SG than JP, by an extreme amount. Even with the addition of the Casio SG, Battle, & Challenge Modes since the thread was last updated, it still pails in comparison to the amount earnable in JP, and NA still has many more things that cost SG. What should be done is compare the price of all the items that cost SG in a month on both JP and NA, calculate the percentage difference. Then, do the same for the amount of earnable SG, and increase NA's SG earned by both of those percentages, but the methods to earn the extra SG must remain repeatable and at a similar level of effort.